2005-06-04 03:28:57 +00:00
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PostgreSQL: PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ⣨FAQ<41> <51>
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< h1 > PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ⣨FAQ<41> <51> < / h1 >
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<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> £<EFBFBD> 2005 <20> <> 06 <20> <> 02 <20> <> <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 22:27:35 CST
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Ŀǰά<C7B0> <CEAC> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> Bruce Momjian (< a href = "mailto:pgman@candle.pha.pa.us" > pgman@candle.pha.pa.us< / a > )< br / >
<09> <> <EFBFBD> İ<EFBFBD> ά<EFBFBD> <CEAC> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> doudou586 <20> <> doudou586_2005@yahoo.com.cn<63> <6E>
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<09> <> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> °汾<C2B0> <E6B1BE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< a href = "http://www.postgresql.org/files/documentation/faqs/FAQ.html" > http://www.postgresql.org/files/documentation/faqs/FAQ.html< / a > <EFBFBD> 鿴<EFBFBD> <EFBFBD>
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<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϵͳƽ <C6BD> <CCA8> <EFBFBD> ص<EFBFBD> <D8B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < a href = "http://www.postgresql.org/docs/faq/" > http://www.postgresql.org/docs/faq/< / a > <EFBFBD> <EFBFBD> <EFBFBD> ش<EFBFBD> <EFBFBD> <EFBFBD> < br / >
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< a href = "#1.1" > 1.1< / a > )PostgreSQL <20> <> ʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ô<EFBFBD> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < br / >
< a href = "#1.2" > 1.2< / a > )PostgreSQL <20> İ<EFBFBD> Ȩ<EFBFBD> <C8A8> ʲô<CAB2> <C3B4> < br / >
< a href = "#1.3" > 1.3< / a > )PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> <EFBFBD> ϵͳƽ <C6BD> ϣ<EFBFBD> < br / >
< a href = "#1.4" > 1.4< / a > )<29> Ҵ<EFBFBD> <D2B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵõ<DCB5> PostgreSQL<51> <4C> < br / >
< a href = "#1.5" > 1.5< / a > )<29> Ҵ<EFBFBD> <D2B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵõ<DCB5> <C3B5> <EFBFBD> PostgreSQL <20> <> ֧<EFBFBD> ֣<EFBFBD> < br / >
< a href = "#1.6" > 1.6< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ύһ <E1BDBB> <D2BB> BUG<55> <47> <EFBFBD> 棿< br / >
< a href = "#1.7" > 1.7< / a > )<29> <> <EFBFBD> °<EFBFBD> <C2B0> <EFBFBD> PostgreSQL <20> <> ʲô<CAB2> <C3B4> < br / >
< a href = "#1.8" > 1.8< / a > )<29> ܹ<EFBFBD> <DCB9> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> < br / >
< a href = "#1.9" > 1.9< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˽<EFBFBD> <CBBD> <EFBFBD> ֪<EFBFBD> <D6AA> BUG <20> <> <EFBFBD> <EFBFBD> ȱ<EFBFBD> Ĺ<EFBFBD> <C4B9> ܣ<EFBFBD> < br / >
< a href = "#1.10" > 1.10< / a > )<29> <> Ӧ<EFBFBD> <D3A6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѧϰ SQL <20> <> < br / >
< a href = "#1.11" > 1.11< / a > )<29> <> Ӧ<EFBFBD> <D3A6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 뿪<EFBFBD> <EBBFAA> <EFBFBD> <EFBFBD> <EFBFBD> 飿< br / >
< a href = "#1.12" > 1.12< / a > )PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Σ<EFBFBD> < br / >
< a href = "#1.13" > 1.13< / a > )˭<> <CBAD> <EFBFBD> ƺ<C6BA> <CDB9> <EFBFBD> PostgreSQL <20> <>
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< a href = "#2.1" > 2.1< / a > )<29> <> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> Ժ<EFBFBD> PostgreSQL <20> <EFBFBD> <F2BDBBB5> <EFBFBD> < br / >
< a href = "#2.2" > 2.2< / a > )<29> <> ʲô<CAB2> <C3B4> <EFBFBD> ߿<EFBFBD> <DFBF> <EFBFBD> PostgreSQL <20> <> <EFBFBD> <EFBFBD> Web ҳ<> 棿< br / >
< a href = "#2.3" > 2.3< / a > )PostgreSQL ӵ<> <D3B5> ͼ<EFBFBD> <CDBC> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < br / >
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< a href = "#3.1" > 3.1< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܰ<EFBFBD> PostgreSQL װ<> <D7B0> /usr/local/pgsql <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ĵط<C4B5> <D8B7> <EFBFBD> < br / >
< a href = "#3.2" > 3.2< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ο <EFBFBD> <CEBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> < br / >
< a href = "#3.3" > 3.3< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ի<EFBFBD> <D4BB> ø<EFBFBD> <C3B8> õ<EFBFBD> <C3B5> <EFBFBD> <EFBFBD> ܣ<EFBFBD> < br / >
< a href = "#3.4" > 3.4< / a > )PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> Ի<EFBFBD> <D4BB> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԣ<EFBFBD> < br / >
< a href = "#3.5" > 3.5< / a > )Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> ͼ<EFBFBD> <CDBC> <EFBFBD> ӵ<EFBFBD> ¼ʱ<C2BC> յ<EFBFBD> <D5B5> <EFBFBD> Sorry, too many clients<74> <73> <20> <> Ϣ<EFBFBD> <CFA2> < br / >
< a href = "#3.6" > 3.6< / a > )ΪʲôҪ<C3B4> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> 汾ʱ<E6B1BE> <CAB1> dump <20> <> restore <20> <> < br / >
< a href = "#3.7" > 3.7< / a > )(ʹ <> <CAB9> PostgreSQL)<29> <> <EFBFBD> <EFBFBD> Ҫʹ <D2AA> <CAB9> ʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <20> <> < br / >
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< a href = "#4.1" > 4.1< / a > )<29> <> <EFBFBD> <EFBFBD> ֻѡ <D6BB> <D1A1> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͷ<EFBFBD> <CDB7> <EFBFBD> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> У <EFBFBD> < br / >
< a href = "#4.2" > 4.2< / a > )<29> <> <EFBFBD> β鿴<CEB2> <E9BFB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> Լ<EFBFBD> <D4BC> û<EFBFBD> <C3BB> Ķ<EFBFBD> <C4B6> 壿<EFBFBD> <E5A3BF> <EFBFBD> β鿴< i > psql< / i > <EFBFBD> <EFBFBD> <EFBFBD> õ<EFBFBD> <EFBFBD> IJ<EFBFBD> ѯָ<EFBFBD> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <EFBFBD> <EFBFBD> ǣ<EFBFBD> < br / >
< a href = "#4.3" > 4.3< / a > )<29> <> <EFBFBD> θ<EFBFBD> <CEB8> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ֶε<D6B6> <CEB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͣ<EFBFBD> < br / >
< a href = "#4.4" > 4.4< / a > )һ <> м<EFBFBD> ¼<EFBFBD> <C2BC> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ <EFBFBD> <DFB4> Ƕ<EFBFBD> <C7B6> ٣<EFBFBD> < br / >
< a href = "#4.5" > 4.5< / a > )<29> 洢һ <E6B4A2> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> ͵<EFBFBD> <CDB5> ı <EFBFBD> <C4B1> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> ٴ<EFBFBD> <D9B4> ̿ռ < br / >
< a href = "#4.6" > 4.6< / a > )Ϊʲô<CAB2> ҵIJ<D2B5> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊʲô<CAB2> <C3B4> Щ<EFBFBD> <D0A9> ѯû<D1AF> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < br / >
< a href = "#4.7" > 4.7< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> ܿ<EFBFBD> <DCBF> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> Ż<EFBFBD> <C5BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ҵIJ<D2B5> ѯ<EFBFBD> ģ<EFBFBD> < br / >
< a href = "#4.8" > 4.8< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> С <D0A1> ص<DEB9> <D8B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> ң<EFBFBD> <D2A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> д<EFBFBD> С <D0A1> ز<DEB9> <D8B2> ң<EFBFBD> < br / >
< a href = "#4.9" > 4.9< / a > )<29> <> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> <EFA3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ֶ<EFBFBD> <D6B6> Ƿ<EFBFBD> Ϊ NULL<4C> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> <EFBFBD> ȷ<D7BC> <C8B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ij<EFBFBD> ֶ<EFBFBD> <D6B6> Ƿ<EFBFBD> <C7B7> <EFBFBD> NULLֵ<4C> <D6B5> < br / >
< a href = "#4.10" > 4.10< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> ֮<EFBFBD> <D6AE> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> ͬ<EFBFBD> <CDAC> < br / >
< a href = "#4.11.1" > 4.11.1< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> /<2F> Զ<EFBFBD> <D4B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶΣ<D6B6> < br / >
< a href = "#4.11.2" > 4.11.2< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> λ<EFBFBD> <CEBB> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> кŵ<D0BA> ֵ<EFBFBD> <D6B5> < br / >
< a href = "#4.11.3" > 4.11.3< / a > )ʹ <> <CAB9> currval() <20> ᵼ<EFBFBD> º<EFBFBD> <C2BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> race condition<6F> <6E> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < br / >
< a href = "#4.11.4" > 4.11.4< / a > )Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 쳣<EFBFBD> <ECB3A3> ֹ<EFBFBD> <D6B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> أ<EFBFBD> Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> ֶε<D6B6> ȡֵ<C8A1> д<EFBFBD> <D0B4> ڼ<EFBFBD> <DABC> <EFBFBD> <EFBFBD> أ<EFBFBD> < br / >
< a href = "#4.12" > 4.12< / a > )ʲô<CAB2> <C3B4> OID<49> <44> ʲô<CAB2> <C3B4> CTID <20> <> < br / >
< a href = "#4.13" > 4.13< / a > )Ϊʲô<CAB2> <C3B4> <EFBFBD> յ<EFBFBD> <D5B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> < i > ERROR: Memory exhausted in AllocSetAlloc()< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < br / >
< a href = "#4.14" > 4.14< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> <EFBFBD> ֪<EFBFBD> <D6AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> PostgreSQL <20> İ汾<C4B0> <E6B1BE> < br / >
< a href = "#4.15" > 4.15< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> δ<EFBFBD> <CEB4> <EFBFBD> һ <EFBFBD> <D2BB> ȱʡֵ<CAA1> ǵ<EFBFBD> ǰʱ<C7B0> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> ֶΣ<D6B6> < br / >
< a href = "#4.16" > 4.16< / a > )<29> <> <EFBFBD> ν <EFBFBD> <CEBD> <EFBFBD> outer join <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> <D3A3> <EFBFBD> < br / >
< a href = "#4.17" > 4.17< / a > )<29> <> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> 漰<EFBFBD> <E6BCB0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> IJ<EFBFBD> ѯ<EFBFBD> <D1AF> < br / >
< a href = "#4.18" > 4.18< / a > )<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ú<EFBFBD> <C3BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ض<EFBFBD> <D8B6> л<EFBFBD> <D0BB> <EFBFBD> <EFBFBD> У <EFBFBD> < br / >
< a href = "#4.19" > 4.19< / a > )Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> PL/PgSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> ʱ<EFBFBD> <CAB1> ʱ<EFBFBD> <CAB1> <EFBFBD> յ<EFBFBD> <D5B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> relation with OID ##### does not exist<73> <74> <EFBFBD> <EFBFBD> < br / >
< a href = "#4.20" > 4.20< / a > )Ŀǰ<C4BF> <C7B0> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> ݸ<EFBFBD> <DDB8> Ʒ <EFBFBD> <C6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ã<EFBFBD> < br / >
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PostgreSQL <20> <> <EFBFBD> <EFBFBD> < i > Post-Gres-Q-L< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <EFBFBD> Ҳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ< i > Postgres< / i > <20> <>
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PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> Ĺ<EFBFBD> ϵ<EFBFBD> <CFB5> <EFBFBD> ݿ<EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> д<EFBFBD> ͳ<EFBFBD> <CDB3> ҵ<EFBFBD> <D2B5> <EFBFBD> ݿ<EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> й<EFBFBD> <D0B9> ܣ<EFBFBD> ͬʱ<CDAC> ֺ<EFBFBD> <D6BA> н<EFBFBD> <D0BD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> DBMS ϵͳ<CFB5> <CDB3> ʹ <EFBFBD> õ<EFBFBD> <C3B5> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> ԡ<EFBFBD>
PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѵ <D1B5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Դ<EFBFBD> <D4B4> <EFBFBD> 붼<EFBFBD> <EBB6BC> <EFBFBD> Ի<EFBFBD> <D4BB> á<EFBFBD>
< / p >
< p >
PostgreSQL <20> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ҪΪ־Ը<D6BE> ߣ<EFBFBD> <DFA3> <EFBFBD> <EFBFBD> DZ鲼<C7B1> <E9B2BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ز<EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϵ<EFBFBD> <CFB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> κι <CEBA> ˾<EFBFBD> <CBBE> <EFBFBD> ơ<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 뿪<EFBFBD> <EBBFAA> <EFBFBD> <EFBFBD> <EFBFBD> 飬<EFBFBD> <E9A3AC> <EFBFBD> μ<EFBFBD> <CEBC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ⣨FAQ<41> <51>
< a href = "http://www.postgresql.org/files/documentation/faqs/FAQ_DEV.html" > http://www.postgresql.org/files/documentation/faqs/FAQ_DEV.html< / a >
< / p >
< h4 > < a name = "1.2" > < / a > 1.2)PostgreSQL <20> İ<EFBFBD> Ȩ<EFBFBD> <C8A8> ʲô?< / h4 >
< p >
PostgreSQL<EFBFBD> ķ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӿ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> BSD<EFBFBD> <EFBFBD> Ȩ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Դ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> û<EFBFBD> <EFBFBD> <EFBFBD> κ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ǻ<EFBFBD> ϲ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> ʽ <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> û<EFBFBD> д<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ı <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< p >
<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> õ<EFBFBD> BSD<EFBFBD> <EFBFBD> Ȩ<EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> ְ<EFBFBD> Ȩ<EFBFBD> <C8A8> c<EFBFBD> <63> 1996-2005<30> <35> PostgreSQL ȫ<> <EFBFBD> С <EFBFBD> 飬<EFBFBD> <E9A3AC> <EFBFBD> ְ<EFBFBD> Ȩ<EFBFBD> <C8A8> c<EFBFBD> <63> 1994-1996 <20> <> <EFBFBD> ݴ<EFBFBD> ѧ<EFBFBD> <D1A7> <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> Portions copyright (c) 1996-2005, PostgreSQL Global Development Group Portions Copyright (c) 1994-6 Regents of the University of California<69> <61>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> κ<EFBFBD> Ŀ<EFBFBD> <C4BF> ʹ <EFBFBD> ã<EFBFBD> <C3A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĺͷַ<CDB7> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> κη<CEBA> <CEB7> ã<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǩ<EFBFBD> <C7A9> <EFBFBD> <EFBFBD> <EFBFBD> ˶<EFBFBD> <CBB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֤<EFBFBD> <D6A4> <EFBFBD> <EFBFBD> ǰ<EFBFBD> <C7B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> İ<EFBFBD> Ȩ<EFBFBD> <C8A8> <EFBFBD> <EFBFBD> <EFBFBD> ͱ<EFBFBD> <CDB1> <EFBFBD> <EFBFBD> Լ<EFBFBD> <D4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֳ<EFBFBD> <D6B3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> п<EFBFBD> <D0BF> <EFBFBD> <EFBFBD> С <EFBFBD>
< / p >
< p >
<09> <> Permission to use, copy, modify, and distribute this software and its
documentation for any purpose, without fee, and without a written agreement is
hereby granted, provided that the above copyright notice and this paragraph and
the following two paragraphs appear in all copies.<2E> <>
< / p >
< p >
<09> <> <EFBFBD> κ<EFBFBD> <CEBA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> £<EFBFBD> <C2A3> <EFBFBD> <EFBFBD> ݴ<EFBFBD> ѧ<EFBFBD> <D1A7> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> <D0B5> <EFBFBD> ʹ <EFBFBD> ô<EFBFBD> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> µĶ<C2B5> <C4B6> κε<CEBA> <CEB5> <EFBFBD> <EFBFBD> ˵<EFBFBD> ֱ<EFBFBD> ӵģ<D3B5>
<09> <> <EFBFBD> ӵģ<D3B5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ģ<EFBFBD> <C4A3> <EFBFBD> <EFBFBD> ӵĻ<D3B5> <C4BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <F0BBB5A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʧ<EFBFBD> <CAA7> <EFBFBD> <EFBFBD> <EFBFBD> Σ<EFBFBD> <CEA3> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> ݴ<EFBFBD> ѧ<EFBFBD> Ѿ<EFBFBD> <D1BE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> ʧ<EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> ʱҲ<CAB1> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> ˡ<EFBFBD>
< / p >
< p >
<09> <> IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST
PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.<2E> <>
< / p >
< p >
<09> <> <EFBFBD> ݴ<EFBFBD> ѧ<EFBFBD> <D1A7> ȷ<EFBFBD> <C8B7> <EFBFBD> <EFBFBD> <EFBFBD> κα <CEBA> ֤<EFBFBD> <D6A4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ijһ <C4B3> ض<EFBFBD> <D8B6> <EFBFBD> ; <EFBFBD> <CDBE> <EFBFBD> <EFBFBD> ҵ<EFBFBD> <D2B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֤<EFBFBD> <D6A4>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> ṩ<EFBFBD> <E1B9A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǻ<EFBFBD> <C7BB> ڡ<EFBFBD> <DAA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǡ<EFBFBD> <C7A1> Ļ<EFBFBD> <C4BB> <EFBFBD> <EFBFBD> ģ<EFBFBD> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݴ<EFBFBD> ѧû<D1A7> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ṩά<E1B9A9> <CEAC> <EFBFBD> <EFBFBD> ֧<EFBFBD> ֣<EFBFBD> <D6A3> <EFBFBD> <EFBFBD> £<EFBFBD> <C2A3> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> <EFBFBD> <EFBFBD> ĵķ<C4B5> <C4B7> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND
THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE,
SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.<2E> <> < br / >
< / p >
< h4 > < a name = "1.3" > < / a > 1.3)PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> <EFBFBD> ϵͳƽ <C6BD> ϣ<EFBFBD> < / h4 >
< p >
һ <> <D2BB> ˵<EFBFBD> <CBB5> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ִ<EFBFBD> <D6B4> <EFBFBD> UNIX <20> <> <EFBFBD> ݵ<EFBFBD> ƽ <C6BD> <CCA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> <EFBFBD> ڰ<EFBFBD> װָ<D7B0> <D6B8> <EFBFBD> <EFBFBD> <EFBFBD> г <EFBFBD> <D0B3> ˷<EFBFBD> <CBB7> <EFBFBD> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȷ<EFBFBD> <C8B7> <EFBFBD> Ե<EFBFBD> ƽ <C6BD> <CCA8>
< / p >
< p >
PostgreSQlҲ<6C> <D2B2> <EFBFBD> <EFBFBD> ֱ<EFBFBD> <D6B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڻ<EFBFBD> <DABB> <EFBFBD> <EFBFBD> <CEA2> Windows-NT<4E> IJ<EFBFBD> <C4B2> <EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> Win2000<30> <30> WinXP <20> <> Win2003<30> <33> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɵİ<C9B5> װ<EFBFBD> <D7B0> <EFBFBD> ɴ<EFBFBD>
< a href = "http://pgfoundry.org/projects/pginstaller" > http://pgfoundry.org/projects/pginstaller< / a > <EFBFBD> <EFBFBD> <EFBFBD> أ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> MSDOS<EFBFBD> <EFBFBD> Windows<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϵͳ
<20> <> Win95<39> <35> Win98<39> <38> WinMe<4D> <65> <EFBFBD> <EFBFBD> Ҫͨ<D2AA> <CDA8> Cygwinģ<6E> <EFBFBD> <E2BBB7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C>
< / p >
< p >
ͬʱҲ<CAB1> <D2B2> һ <EFBFBD> <D2BB> ΪNovell Netware 6<> <36> <EFBFBD> <EFBFBD> <EFBFBD> İ汾<C4B0> ɴ<EFBFBD> < a href = "http://forge.novell.com" > http://forge.novell.com < / a > <EFBFBD> <EFBFBD> ȡ<EFBFBD> <EFBFBD> ΪOS/2<> <32> <EFBFBD> <EFBFBD> <EFBFBD> İ汾<C4B0> ɴ<EFBFBD>
< a href = "http://hobbes.nmsu.edu/cgi-bin/h-search?sh=1&button=Search&key=postgreSQL&stype=all&sort=type&dir=%2F" >
http://hobbes.nmsu.edu/cgi-bin/h-search?sh=1& button=Search& key=postgreSQL& stype=all& sort=type& dir=%2F< / a >
< / p >
< h4 > < a name = "1.4" > < / a > 1.4)<29> Ҵ<EFBFBD> <D2B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵõ<DCB5> PostgreSQL<51> <4C> < / h4 >
< p >
ͨ<> <CDA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɴ<EFBFBD> < a href = "http://www.postgresql.org/ftp/" > http://www.postgresql.org/ftp/< / a > <EFBFBD> <EFBFBD> <EFBFBD> أ<EFBFBD> Ҳ<EFBFBD> <EFBFBD> ͨ<EFBFBD> <EFBFBD> FTP<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< a href = "ftp://ftp.PostgreSQL.org/pub/" > ftp://ftp.PostgreSQL.org/pub/< / a > վ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ء<EFBFBD>
< / p >
< h4 > < a name = "1.5" > < / a > 1.5)<29> Ҵ<EFBFBD> <D2B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵõ<DCB5> <C3B5> <EFBFBD> PostgreSQL <20> <> ֧<EFBFBD> ֣<EFBFBD> < / h4 >
< p >
PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> ʼ <EFBFBD> <CABC> б <EFBFBD> Ϊ<EFBFBD> <CEAA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> ṩ<EFBFBD> <E1B9A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʼ <EFBFBD> <CABC> б <EFBFBD> <D0B1> <EFBFBD> <EFBFBD> <EFBFBD> վ<EFBFBD> <D5BE> <EFBFBD> <EFBFBD> < a href = "http://www.postgresql.org/community/lists/" > http://www.postgresql.org/community/lists/< / a > <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> £<EFBFBD> <EFBFBD> ȼ<EFBFBD> <EFBFBD> <EFBFBD> < i > General< / i > <20> <> < i > Bug< / i > <EFBFBD> ʼ <EFBFBD> <EFBFBD> б <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> Ϻ <EFBFBD> ʼ <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> Ҫ<EFBFBD> <D2AA> IRCƵ<43> <C6B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> FreeNode(< i > irc.freenode.net< / i > )<29> <> < i > #postgresql< / i > <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϴ<EFBFBD> Ƶ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> UNIX<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> irc<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ָ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <EFBFBD>
irc -c '#postgresql' "$USER" irc.freenode.net <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> IRC<52> ͻ<EFBFBD> <CDBB> ˳<EFBFBD> <CBB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڴ<EFBFBD> <DAB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> л<EFBFBD> <D0BB> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƶ<EFBFBD> <C6B5> (< i > #postgersql-es< / i > )<29> ͷ<EFBFBD> <CDB7> <EFBFBD> Ƶ<EFBFBD> <C6B5>
(< i > #postgresql-fr< / i > )<29> <> ͬ<EFBFBD> <CDAC> <EFBFBD> أ<EFBFBD> <D8A3> <EFBFBD> EFNET<45> <54> Ҳ<EFBFBD> <D2B2> һ <EFBFBD> <D2BB> PostgreSQL<51> Ľ<EFBFBD> <C4BD> <EFBFBD> Ƶ<EFBFBD> <C6B5> <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> ҵ֧<D2B5> ֹ<EFBFBD> ˾<EFBFBD> <CBBE> <EFBFBD> б <EFBFBD> <D0B1> <EFBFBD> < a href = " http://techdocs.postgresql.org/companies.php" > http://techdocs.postgresql.org/companies.php< / a > <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "1.6" > < / a > 1.6)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ύһ <E1BDBB> <D2BB> BUG<55> <47> <EFBFBD> 棿< / h4 >
< p >
<09> ɷ<EFBFBD> <C9B7> <EFBFBD> < a href = "http://www.postgresql.org/support/submitbug" > http://www.postgresql.org/support/submitbug< / a > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> дBug<EFBFBD> ϱ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɡ <EFBFBD>
< / p >
< p >
ͬ<> <CDAC> Ҳ<EFBFBD> ɷ<EFBFBD> <C9B7> <EFBFBD> ftpվ<70> <D5BE> < a href = "ftp://ftp.PostgreSQL.org/pub/" > ftp://ftp.PostgreSQL.org/pub/< / a > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <DEB8> µ<EFBFBD> PostgreSQL<51> 汾<EFBFBD> <EFBFBD> <F2B2B9B6> <EFBFBD>
< / p >
< h4 > < a name = "1.7" > < / a > 1.7)<29> <> <EFBFBD> °<EFBFBD> <C2B0> <EFBFBD> PostgreSQL <20> <> ʲô<CAB2> <C3B4> < / h4 >
< p >
PostgreSQL <20> <> <EFBFBD> µİ汾<C4B0> ǰ汾 8.0.2 <20> <> <EFBFBD> <EFBFBD> ע<EFBFBD> <D7A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> °汾Ϊ8.0.3<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> Ǽƻ<C7BC> ÿ<EFBFBD> 귢<EFBFBD> <EAB7A2> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> 汾<EFBFBD> <E6B1BE> ÿ<EFBFBD> <C3BF> <EFBFBD> <EFBFBD> <EFBFBD> ·<EFBFBD> <C2B7> <EFBFBD> һ <EFBFBD> <D2BB> С <EFBFBD> 汾<EFBFBD> <E6B1BE>
< / p >
< h4 > < a name = "1.8" > < / a > 1.8)<29> ܹ<EFBFBD> <DCB9> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> < / h4 >
< p >
PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> һ <D2BB> ֲᣬ<D6B2> ֲ<EFBFBD> ҳ<EFBFBD> <D2B3> һ <D2BB> IJ<EFBFBD> <C4B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӡ<EFBFBD> <D3A1> μ<EFBFBD> /doc Ŀ¼<C4BF> <C2BC> <EFBFBD> <EFBFBD> ע<EFBFBD> <D7A2> ӦΪ $PGHOME/doc<6F> <63> <EFBFBD> <EFBFBD>
<09> 㻹<EFBFBD> <E3BBB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> <EFBFBD> ֲᣬ<D6B2> <E1A3AC> <EFBFBD> <EFBFBD> ַ<EFBFBD> ǣ<EFBFBD> < a href = "http://www.PostgreSQL.org/docs" > http://www.PostgreSQL.org/docs< / a > <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ṩ<EFBFBD> <E1B9A9> <EFBFBD> <EFBFBD>
< a href = "http://www.PostgreSQL.org/docs/awbook.html" > http://www.PostgreSQL.org/docs/awbook.html< / a >
<09> <> < a href = "http://www.commandprompt.com/ppbook/" > http://www.commandprompt.com/ppbook/< / a > <20> <>
Ҳ<> д<EFBFBD> <D0B4> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> 鼮<EFBFBD> ɹ<EFBFBD> <C9B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> <EFBFBD> е <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Korry Douglas<61> <73> д<EFBFBD> ġ<EFBFBD> <C4A1> <EFBFBD>
< a href = "http://techdocs.PostgreSQL.org/techdocs/bookreviews.php" > http://techdocs.PostgreSQL.org/techdocs/bookreviews.php< / a > <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> д<EFBFBD> <D0B4> <EFBFBD> <EFBFBD> й<EFBFBD> PostgreSQL<51> 鼮<EFBFBD> ļ<EFBFBD> <C4BC> 顣
<09> <> < a href = "http://techdocs.PostgreSQL.org/" > http://techdocs.PostgreSQL.org/< / a > <EFBFBD> <EFBFBD> <EFBFBD> ռ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> й<EFBFBD> PostgreSQL <20> Ĵ<EFBFBD> <C4B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ¡<EFBFBD>
< / p >
< p >
<09> ͻ<EFBFBD> <CDBB> ˵<EFBFBD> <CBB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> г <EFBFBD> <D0B3> <EFBFBD> < i > psql< / i > <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> \d <20> <> ͷ<EFBFBD> <CDB7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EEA3AC> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <CABE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͣ<EFBFBD> <CDA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵȵ<DCB5> <C8B5> <EFBFBD> Ϣ<EFBFBD> <CFA2> ʹ <EFBFBD> <CAB9> \? <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <CABE> <EFBFBD> п<EFBFBD> <D0BF> õ<EFBFBD> <C3B5> <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> ǵ<EFBFBD> web վ<> <D5BE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD>
< / p >
< h4 > < a name = "1.9" > < / a > 1.9)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˽<EFBFBD> <CBBD> <EFBFBD> ֪<EFBFBD> <D6AA> BUG <20> <> <EFBFBD> <EFBFBD> ȱ<EFBFBD> Ĺ<EFBFBD> <C4B9> ܣ<EFBFBD> < / h4 >
< p >
PostgreSQL ֧<> <D6A7> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> չ<EFBFBD> ˵<EFBFBD> SQL-92 <20> <> <EFBFBD> Ӽ<EFBFBD> <D3BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǵ<EFBFBD> < a href = "http://www.postgresql.org/docs/faqs.TODO.html" > TODO< / a > <20> б <EFBFBD> <D0B1> <EFBFBD> <EFBFBD> <EFBFBD> ȡһ <C8A1> <D2BB> <EFBFBD> <EFBFBD> ֪Bug<75> <67> <EFBFBD> <EFBFBD> ȱ<EFBFBD> Ĺ<EFBFBD> <C4B9> ܺͽ<DCBA> <CDBD> <EFBFBD> <EFBFBD> ļƻ<C4BC> <C6BB> <EFBFBD>
< / p >
< h4 > < a name = "1.10" > < / a > 1.10)<29> <> Ӧ<EFBFBD> <D3A6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѧϰ SQL <20> <> < / h4 >
< p >
<09> <> <EFBFBD> ȿ<EFBFBD> <C8BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ᵽ<EFBFBD> <E1B5BD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C> <EFBFBD> ص<EFBFBD> <D8B5> 鼮<EFBFBD> <E9BCAE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> < i > Teach Yourself SQL in 21 Days, Second Edition< / i > <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> ǵ<EFBFBD> <C7B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> ϲ <EFBFBD> <CFB2> < i > The Practical SQL Handbook< / i > Bowman, Judith S., et al., Addison-Wesley<65> <79> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϲ <EFBFBD> <CFB2>
< i > The Complete Reference SQL< / i > , Groff et al., McGraw-Hill<6C> <6C>
< / p >
< h4 > < a name = "1.11" > < / a > 1.11)<29> <> Ӧ<EFBFBD> <D3A6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 뿪<EFBFBD> <EBBFAA> <EFBFBD> <EFBFBD> <EFBFBD> 飿< / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> < a href = "http://www.postgresql.org/docs/faqs.FAQ_DEV.html" > Developer's FAQ < / a > <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "1.12" > < / a > 1.12)PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Σ<EFBFBD> < / h4 >
< p >
<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> кü<EFBFBD> <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܣ<EFBFBD> <EFBFBD> ɿ<EFBFBD> <EFBFBD> ԣ<EFBFBD> ֧<EFBFBD> ֺͼ۸<EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< dl >
< dt > < b > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
PostgreSQL ӵ<> д<EFBFBD> <D0B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> DBMS <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԣ<EFBFBD>
<09> <> <EFBFBD> 磺<EFBFBD> <E7A3BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͼ<EFBFBD> <CDBC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ο <EFBFBD> <CEBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ժ<D4BA> <CDB8> ӵ<EFBFBD> <D3B5> <EFBFBD> <EFBFBD> ȡ<EFBFBD>
<09> <> <EFBFBD> ǻ<EFBFBD> <C7BB> <EFBFBD> һ <D2BB> <D0A9> <EFBFBD> <EFBFBD> û<EFBFBD> е <EFBFBD> <D0B5> <EFBFBD> <EFBFBD> ԣ<EFBFBD> <D4A3> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͣ<EFBFBD> <CDA3> ̳У <CCB3> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ͷ<EFBFBD> <CDB6> 汾<EFBFBD> <E6B1BE> <EFBFBD> п<EFBFBD> <D0BF> <EFBFBD> <EFBFBD> Լ<EFBFBD> <D4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> õȡ<C3B5> < br / >
< / dd >
< dt > < b > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> úͿ <C3BA> Դ<EFBFBD> <D4B4> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƶ<EFBFBD> <C6B5> <EFBFBD> <EFBFBD> ܡ<EFBFBD>
<09> <> ijЩ<C4B3> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȽϿ죬<CFBF> <ECA3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƚ<EFBFBD> <C8BD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> ȣ <EFBFBD> <C8A3> <EFBFBD> <EFBFBD> ǵ<EFBFBD> <C7B5> <EFBFBD> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD> +/- 10%֮<> 䡣< br / >
< / dd >
< dt > < b > <EFBFBD> ɿ<EFBFBD> <EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
<09> <> <EFBFBD> <EFBFBD> ֪<EFBFBD> <D6AA> DBMS <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ǿɿ<C7BF> <C9BF> ģ<EFBFBD> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ö<EFBFBD> û<EFBFBD> С <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> Ŭ<EFBFBD> <C5AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Եģ<D4B5> <C4A3> ȶ<EFBFBD> <C8B6> ij<EFBFBD> <C4B3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ٵĴ<D9B5> <C4B4> 롣ÿ<EBA1A3> <C3BF> <EFBFBD> 汾<EFBFBD> <E6B1BE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> µ<EFBFBD> beta
<09> <> <EFBFBD> <EFBFBD> ʱ<EFBFBD> 䣬<EFBFBD> <E4A3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǵķ<C7B5> <C4B7> <EFBFBD> <EFBFBD> <EFBFBD> ʷ<EFBFBD> <CAB7> ʾ <EFBFBD> <CABE> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> <EFBFBD> ṩ<EFBFBD> ȶ<EFBFBD> <C8B6> ģ<EFBFBD> <C4A3> ι <CCB5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> õİ汾<C4B0> <E6B1BE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> ⷽ<EFBFBD> <E2B7BD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ൱<EFBFBD> ġ<EFBFBD> < br / >
< / dd >
< dt > < b > ֧<EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
<09> <> <EFBFBD> ǵ<EFBFBD> <C7B5> ʼ <EFBFBD> <CABC> б <EFBFBD> <D0B1> ṩһ <E1B9A9> <D2BB> <EFBFBD> dz<EFBFBD> <C7B3> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <D4B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> κ<EFBFBD> <CEBA> <EFBFBD> <EFBFBD> ⡣
<09> <> <EFBFBD> Dz<EFBFBD> <C7B2> ܱ<EFBFBD> ֤<EFBFBD> ϶<EFBFBD> <CFB6> ܽ<EFBFBD> <DCBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ⣬<EFBFBD> <E2A3AC> <EFBFBD> <EFBFBD> ֮<EFBFBD> £<EFBFBD> <C2A3> <EFBFBD> <EFBFBD> <EFBFBD> DBMS Ҳ<> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܹ<EFBFBD> <DCB9> ṩ<EFBFBD> <E1B9A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
ֱ<> <D6B1> <EFBFBD> 뿪<EFBFBD> <EBBFAA> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> û<EFBFBD> Ⱥ<EFBFBD> <C8BA> <EFBFBD> ֲ<EFBFBD> <D6B2> <EFBFBD> Դ<EFBFBD> <D4B4> <EFBFBD> <EFBFBD> <EFBFBD> Ӵ<EFBFBD> <D3B4> <EFBFBD> PostgreSQL <20> <> ֧<EFBFBD> ֱ<EFBFBD> <D6B1> <EFBFBD> <EFBFBD> <EFBFBD> DBMS
<09> <> Ҫ<EFBFBD> á<EFBFBD> <C3A1> <EFBFBD> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> ҵ<EFBFBD> Ե<EFBFBD> Ԥ<EFBFBD> <D4A4> װ<EFBFBD> <D7B0> ֧<EFBFBD> ֣<EFBFBD> <D6A3> <EFBFBD> <EFBFBD> Ը<EFBFBD> <D4B8> ṩ<EFBFBD> <E1B9A9> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> Ҫ<EFBFBD> <D2AA> <EFBFBD> ˡ<EFBFBD> <CBA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> FAQ <20> <> <EFBFBD> <EFBFBD> 1.5 С <> ڣ<EFBFBD> < br / >
< / dd >
< dt > < b > <EFBFBD> ۸<EFBFBD> < / b > < / dt >
< dd >
<09> <> <EFBFBD> Ƕ<EFBFBD> <C7B6> κ<EFBFBD> <CEBA> <EFBFBD> ; <EFBFBD> <CDBE> <EFBFBD> <EFBFBD> <EFBFBD> ѣ<EFBFBD> <D1A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> úͷ<C3BA> <CDB7> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> ġ<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> Բ<EFBFBD> <D4B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƶ<EFBFBD> <C6B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> IJ<EFBFBD> Ʒ <EFBFBD> <C6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǵĴ<C7B5> <C4B4> 룬<EFBFBD> <EBA3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> İ<EFBFBD> Ȩ<EFBFBD> <C8A8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> BSD <20> <> <EFBFBD> <EFBFBD> <EFBFBD> İ<EFBFBD> Ȩ<EFBFBD> ⡣
< / dd >
< / dl >
< h4 > < a name = "1.13" > < / a > 1.13)˭<> <CBAD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ѱ<EFBFBD> <D1B0> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˣ<EFBFBD> <CBA3> <EFBFBD> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> ίԱ<CEAF> ᣬ<EFBFBD> <E1A3AC> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˾<EFBFBD> <CBBE> <EFBFBD> <EFBFBD> ֻ<EFBFBD> ܷ<EFBFBD> <DCB7> <EFBFBD> <EFBFBD> <EFBFBD> ---<2D> <> Ϊһ <CEAA> <D2BB> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> ڣ<EFBFBD> <DAA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǵ<EFBFBD> ȷ<EFBFBD> <C8B7> һ <EFBFBD> <D2BB>
ίԱ<CEAF> <D4B1> <EFBFBD> <EFBFBD> CVS<56> <53> <EFBFBD> <EFBFBD> <EFBFBD> 飬<EFBFBD> <E9A3AC> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> Ϊ<EFBFBD> ˽<EFBFBD> <CBBD> й<EFBFBD> <D0B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƕ<EFBFBD> PostgreSQL<51> <4C> <EFBFBD> п<EFBFBD> <D0BF> ƣ<EFBFBD> PostgreSQL<51> <4C> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> κ<EFBFBD> <CEBA> ˾<EFBFBD>
<09> ɲμӵĿ<D3B5> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> Ƶģ<C6B5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> ľ<EFBFBD> <C4BE> Ǽ<EFBFBD> <C7BC> <EFBFBD> <EFBFBD> ʼ <EFBFBD> <CABC> б <EFBFBD> <D0B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ۼ<EFBFBD> <DBBC> ɣ <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> PostgreSQL<51> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< a href = "http://www.postgresql.org/docs/faqs.FAQ_DEV.html" > Developer's FAQ < / a > <EFBFBD> <EFBFBD> ȡ<EFBFBD> <EFBFBD> Ϣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< hr / >
< div > < h2 > <EFBFBD> û<EFBFBD> <EFBFBD> ͻ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h2 > < / div >
< h4 > < a name = "2.1" > < / a > 2.1)<29> <> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> Ժ<EFBFBD> PostgreSQL <20> <EFBFBD> <F2BDBBB5> <EFBFBD> < / h4 >
< p >
PostgreSQL(ȱʡ<C8B1> <CAA1> <EFBFBD> <EFBFBD> )ֻ<> <D6BB> װ<EFBFBD> <D7B0> C<EFBFBD> <43> <EFBFBD> <EFBFBD> Ƕʽ <CABD> Ľӿڣ<D3BF> <DAA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ľӿڶ<D3BF> <DAB6> Ƕ<EFBFBD> <C7B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> ܹ<EFBFBD> <DCB9> ֱ<EFBFBD> <D6B1> <EFBFBD> <EFBFBD> أ<EFBFBD> <D8A3> <EFBFBD> Щ<EFBFBD> ӿ<EFBFBD> <D3BF> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> <EFBFBD> ĺô<C4BA>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> ǿ<EFBFBD> <C7BF> <EFBFBD> <EFBFBD> и<EFBFBD> <D0B8> Եķ<D4B5> <C4B7> <EFBFBD> <EFBFBD> ƻ<EFBFBD> <C6BB> <EFBFBD> <CDB8> Զ<EFBFBD> <D4B6> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <C4BF> <EFBFBD> <EFBFBD> 顣
< / p >
< p >
һ <D2BB> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PHP<48> <50> <EFBFBD> з<EFBFBD> <D0B7> <EFBFBD> PostgreSQL <20> Ľӿڣ<D3BF> Perl,TCL,Python<6F> Լ<EFBFBD> <D4BC> ܶ<EFBFBD> <DCB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԵĽӿ<C4BD> <D3BF> <EFBFBD>
< a href = "http://gborg.postgresql.org/" > http://gborg.postgresql.org < / a > <EFBFBD> ϵ<EFBFBD> < i > Drivers/Interfaces< / i > С <EFBFBD> ڿ<EFBFBD> <EFBFBD> ҵ<EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> Internet<65> <74> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "2.2" > < / a > 2.2)<29> <> ʲô<CAB2> <C3B4> <EFBFBD> ߿<EFBFBD> <DFBF> <EFBFBD> PostgreSQL <20> <> <EFBFBD> <EFBFBD> Web ҳ<> 棿< / h4 >
< p >
һ <> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> Ϊ<EFBFBD> <CEAA> ̨<EFBFBD> <CCA8> ͦ<EFBFBD> <CDA6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> վ<EFBFBD> <D5BE> <EFBFBD> ǣ<EFBFBD> < a href = "http://www.webreview.com" > http://www.webreview.com< / a > <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> Web <20> <> <EFBFBD> ɣ <EFBFBD> PHP <20> <> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> õĽӿڡ<D3BF> <DAA1> <EFBFBD> <EFBFBD> ڣ<EFBFBD> < a href = "http://www.php.net/" > http://www.php.net/< / a > <EFBFBD> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> ڸ<EFBFBD> <DAB8> ӵ<EFBFBD> <D3B5> <EFBFBD> <EFBFBD> ܶ<F1A3ACBA> <DCB6> ˲<EFBFBD> <CBB2> <EFBFBD> Perl <20> ӿں<D3BF> CGI.pm <20> <> mod_perl <20> <>
< / p >
< h4 > < a name = "2.3" > < / a > 2.3)PostgreSQL ӵ<> <D3B5> ͼ<EFBFBD> <CDBC> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h4 >
< p >
<09> ǵģ<C7B5> <C4A3> <EFBFBD> < a href = "http://techdocs.postgresql.org/guides/GUITools" > http://techdocs.postgresql.org/guides/GUITools< / a > <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϸ<EFBFBD> <EFBFBD> <EFBFBD> б <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< hr / >
< div > < h2 > ϵͳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h2 > < / div >
< h4 > < a name = "3.1" > < / a > 3.1)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܰ<EFBFBD> PostgreSQL װ<> <D7B0> /usr/local/pgsql <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ĵط<C4B5> <D8B7> <EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> configure ʱ<> <CAB1> <EFBFBD> <EFBFBD> --prefix ѡ <>
< / p >
< h4 > < a name = "3.2" > < / a > 3.2)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ο <EFBFBD> <CEBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> < / h4 >
< p >
ȱʡʱ<CAA1> <CAB1> PostgreSQL ֻ<> <D6BB> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> unix <20> <> <EFBFBD> <EFBFBD> <D7BD> ֻ<EFBFBD> TCP/IP<49> <50> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӡ<EFBFBD>
<09> <> ֻ<EFBFBD> <D6BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <DEB8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> < i > postgresql.conf< / i > <EFBFBD> е <EFBFBD> < i > listen_addresses< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> < i > pg_hba.conf< / i > <EFBFBD> д<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> host-based <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֤<EFBFBD> <D6A4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Dz<EFBFBD> <C7B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӵġ<D3B5>
< / p >
< h4 > < a name = "3.3" > < / a > 3.3)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ի<EFBFBD> <D4BB> ø<EFBFBD> <C3B8> õ<EFBFBD> <C3B5> <EFBFBD> <EFBFBD> ܣ<EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C> DZ<EFBFBD> ܡ<EFBFBD>
< / p >
< dl >
< dt > < b > <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> ʽ <EFBFBD> ı < / b > < / dt >
< dd >
<09> <> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> 漰<EFBFBD> IJ<DEB8> ѯ<EFBFBD> <D1AF> ʽ <EFBFBD> Ի<EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> õ<EFBFBD> <C3B5> <EFBFBD> <EFBFBD> <EFBFBD> :
< ul >
< li > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> Ͳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / li >
< li > ʹ <EFBFBD> <EFBFBD> COPY<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Insert<EFBFBD> <EFBFBD> <EFBFBD> 䣻< / li >
< li > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> SQL<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Լ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ύ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / li >
< li > <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ¼ʱʹ <EFBFBD> <EFBFBD> CLUSTER<EFBFBD> <EFBFBD> < / li >
< li > <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ּ<EFBFBD> ¼ʱʹ <EFBFBD> <EFBFBD> LIMIT<EFBFBD> <EFBFBD> < / li >
< li > ʹ <EFBFBD> <EFBFBD> Ԥ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> Prepared Query)<29> <> < / li >
< li > ʹ <EFBFBD> <EFBFBD> ANALYZE<EFBFBD> Ա<EFBFBD> <EFBFBD> ־<EFBFBD> ȷ<EFBFBD> <EFBFBD> <EFBFBD> Ż<EFBFBD> ͳ<EFBFBD> ƣ<EFBFBD> < / li >
< li > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> VACUUM <20> <> < i > pg_autovacuum< / i > < / li >
< li > <EFBFBD> <EFBFBD> <EFBFBD> д<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݸ<EFBFBD> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <EFBFBD> ɾ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ȼ<EFBFBD> <EFBFBD> <EFBFBD> ؽ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / li >
< / ul >
< / dd >
< dt > < b > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> < i > postgres.conf< / i > <EFBFBD> е <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ö<EFBFBD> <EFBFBD> <EFBFBD> Ӱ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> в<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> б <EFBFBD> <EFBFBD> ɼ<EFBFBD> <EFBFBD> <EFBFBD>
< a href = "http://www.postgresql.org/docs/current/static/runtime.html" > Administration Guide/Server Run-time Environment/Run-time Configuration< / a > <EFBFBD> <EFBFBD>
<09> йز<D0B9> <D8B2> <EFBFBD> <EFBFBD> Ľ<EFBFBD> <C4BD> Ϳ <CDBF> <C9BC> <EFBFBD> < a href = "http://www.varlena.com/varlena/GeneralBits/Tidbits/annotated_conf_e.html" >
http://www.varlena.com/varlena/GeneralBits/Tidbits/annotated_conf_e.html < / a > <20> <>
< a href = "http://www.varlena.com/varlena/GeneralBits/Tidbits/perf.html" > http://www.varlena.com/varlena/GeneralBits/Tidbits/perf.html< / a > <EFBFBD> <EFBFBD>
< / dd >
< dt > < b > Ӳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѡ <EFBFBD> <EFBFBD> < / b > < / dt >
< dd >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܵ<EFBFBD> Ӱ<EFBFBD> <D3B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < a href = "http://candle.pha.pa.us/main/writings/pgsql/hw_performance/index.html" >
http://candle.pha.pa.us/main/writings/pgsql/hw_performance/index.html< / a > <20> <>
< a href = "http://www.powerpostgresql.com/PerfList/" > http://www.powerpostgresql.com/PerfList/< / a > <EFBFBD> <EFBFBD>
< / dd >
< / dl >
< h4 > < a name = "3.4" > < / a > 3.4)PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> Ի<EFBFBD> <D4BB> <EFBFBD> ʲô<CAB2> <C3B4> <EFBFBD> ĵ<EFBFBD> <C4B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԣ<EFBFBD> < / h4 >
< p >
PostgreSQL <20> кܶ<D0BA> <DCB6> <EFBFBD> <EFBFBD> <EFBFBD> < i > log_* < / i > <EFBFBD> ķ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ñ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> ѯ<EFBFBD> Ĵ<EFBFBD> ӡ<EFBFBD> ͽ<EFBFBD> <EFBFBD> <EFBFBD> ͳ<EFBFBD> ƣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ե<EFBFBD> <EFBFBD> Ժ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܲ<EFBFBD> <EFBFBD> Ժ<EFBFBD> <EFBFBD> а <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "3.5" > < / a > 3.5)Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> ͼ<EFBFBD> <CDBC> <EFBFBD> <EFBFBD> ʱ<EFBFBD> յ<EFBFBD> <D5B5> <EFBFBD> Sorry, too many clients<74> <73> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <CABE> <EFBFBD> Ѵ <30> <30> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ̨<EFBFBD> <CCA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> <C6A3> <EFBFBD> <EFBFBD> <EFBFBD> Ҫͨ<D2AA> <CDA8> <EFBFBD> <EFBFBD> < i > postgresql.conf< / i > <EFBFBD> ļ<EFBFBD> <EFBFBD> е <EFBFBD> < i > max_connections< / i > ֵ<EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> postmaster<65> ĺ<EFBFBD> ̨<EFBFBD> <CCA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĺ<DEB8> <C4BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > postmaster< / i > <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "3.6" > < / a > 3.6)ΪʲôҪ<C3B4> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> 汾ʱ<E6B1BE> <CAB1> dump <20> <> restore <20> <> < / h4 >
< p >
PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ÿ<EFBFBD> <C3BF> С <EFBFBD> <D0A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˽<EFBFBD> <CBBD> ٵ<EFBFBD> <D9B5> ģ<DEB8> <C4A3> <EFBFBD> <EFBFBD> ˴ <EFBFBD> 7.4.0 <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 7.4.1 <20> <> <EFBFBD> <EFBFBD> Ҫ dump <20> <> restore<72> <65>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 7.3 <20> <> 7.4<EFBFBD> <EFBFBD> ͨ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ϵͳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݱ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <EFBFBD>
<09> <> Щ<EFBFBD> 仯һ <E4BBAF> <D2BB> <EFBFBD> Ƚϸ<C8BD> <CFB8> ӣ<EFBFBD> <D3A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Dz<EFBFBD> ά<EFBFBD> <CEAC> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݡ<EFBFBD>
dump <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ݰ<EFBFBD> <DDB0> <EFBFBD> ͨ<EFBFBD> õĸ<C3B5> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ա<EFBFBD> <D4B1> <EFBFBD> <EFBFBD> ¼<EFBFBD> <C2BC> ز<EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> µ<EFBFBD> <C2B5> ڲ<EFBFBD> <DAB2> <EFBFBD> ʽ <EFBFBD> <CABD>
< / p >
< h4 > < a name = "3.7" > < / a > 3.7)(ʹ <> <CAB9> PostgreSQL)<29> <> <EFBFBD> <EFBFBD> Ҫʹ <D2AA> <CAB9> ʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <20> <> < / h4 >
< p >
<09> <> <EFBFBD> ڼ<EFBFBD> <DABC> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ǽ<EFBFBD> <C7BC> ݵģ<DDB5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> м<EFBFBD> <D0BC> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> ͬ<EFBFBD> ġ<EFBFBD> <C4A1> <EFBFBD> ʵ<EFBFBD> ϲ <EFBFBD> <CFB2> ǣ<EFBFBD>
ECC RAM<41> <4D> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> żУ <C5BC> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> ڴ棩<DAB4> <E6A3A9> SCSI <20> <> Ӳ<EFBFBD> ̣<EFBFBD> <CCA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʵ<EFBFBD> <CAB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> <EFBFBD> ˻<EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> ӿɿ<D3BF> <C9BF> Ҿ<EFBFBD> <D2BE> и<EFBFBD> <D0B8> õ<EFBFBD> <C3B5> <EFBFBD> <EFBFBD> ܡ<EFBFBD> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> κ<EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> ϣ<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɿ<EFBFBD> <C9BF> Ժ<EFBFBD> <D4BA> <EFBFBD> <EFBFBD> ܶ<EFBFBD> <DCB6> <EFBFBD> <EFBFBD> <EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫȫ<D2AA> <C8AB> <EFBFBD> <EFBFBD> <EFBFBD> о <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˡ<EFBFBD> <CBA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǵ<EFBFBD> <C7B5> ʼ <EFBFBD> <CABC> б <EFBFBD> <D0B1> <EFBFBD> Ҳ<EFBFBD> й<EFBFBD> <D0B9> <EFBFBD>
Ӳ<> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> ú<EFBFBD> <C3BA> Լ۱ <DBB1> <C8B5> <EFBFBD> <EFBFBD> ۡ<EFBFBD>
< / p >
< hr / >
< div > < h2 > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h2 > < / div >
< h4 > < a name = "4.1" > < / a > 4.1)<29> <> <EFBFBD> <EFBFBD> ֻѡ <D6BB> <D1A1> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͷ<EFBFBD> <CDB7> <EFBFBD> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> У <EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֻ<EFBFBD> <D6BB> Ҫ<EFBFBD> <D2AA> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <DDA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ִ<EFBFBD> в<EFBFBD> ѯ<EFBFBD> <D1AF> ֪<EFBFBD> <D6AA> ȷ<EFBFBD> е <EFBFBD> <D0B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> LIMIT<49> <54> <EFBFBD> ܡ<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > ORDER BY< / i > <EFBFBD> е <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƥ<EFBFBD> 䣬PostgreSQL <20> <> <EFBFBD> ܾ<EFBFBD> ֻ<EFBFBD> <D6BB> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> ͷ<EFBFBD> <CDB7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ¼<EFBFBD> <C2BC>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <F2BDABB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> д<EFBFBD> <D0B4> <EFBFBD> ֱ<EFBFBD> <D6B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ִ<EFBFBD> в<EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <CAB1> ֪<EFBFBD> <D6AA> ȷ<EFBFBD> е <D0B5> ¼<EFBFBD> <C2BC> <EFBFBD> <EFBFBD>
<09> <> ʹ <EFBFBD> <CAB9> <EFBFBD> α <EFBFBD> (cursor)<29> <> FETCH<43> <48> <EFBFBD> ܡ<EFBFBD>
< / p >
< p >
<09> <> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> ·<EFBFBD> <C2B7> <EFBFBD> <EFBFBD> <EFBFBD> ȡһ <C8A1> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ¼<EFBFBD> ģ<EFBFBD>
< / p >
< pre >
SELECT cols
FROM tab
ORDER BY random()
LIMIT 1 ;
< / pre >
< h4 > < a name = "4.2" > < / a > 4.2)<29> <> <EFBFBD> β鿴<CEB2> <E9BFB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> Լ<EFBFBD> <D4BC> û<EFBFBD> <C3BB> Ķ<EFBFBD> <C4B6> 壿<EFBFBD> <E5A3BF> <EFBFBD> β鿴< i > psql< / i > <EFBFBD> <EFBFBD> <EFBFBD> õ<EFBFBD> <EFBFBD> IJ<EFBFBD> ѯָ<EFBFBD> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <EFBFBD> <EFBFBD> ǣ<EFBFBD> < / h4 >
< p >
<09> <> < i > psql< / i > <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> \dt <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʾ <EFBFBD> <CABE> <EFBFBD> ݱ<EFBFBD> <DDB1> Ķ<EFBFBD> <C4B6> 壬Ҫ<E5A3AC> ˽<EFBFBD> < i > psql< / i > <EFBFBD> е <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> б <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> \? <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ⣬<EFBFBD> <E2A3AC> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> Ķ<EFBFBD> < i > psql< / i > <20> <> Դ<EFBFBD> <D4B4> <EFBFBD> <EFBFBD>
<09> ļ<EFBFBD> < i > pgsql/src/bin/psql/describe.c< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > psql< / i > <EFBFBD> <EFBFBD> б <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> SQL <20> <> <EFBFBD> <EFBFBD> 㻹<EFBFBD> <E3BBB9> <EFBFBD> Դ<EFBFBD> < i > -E< / i > ѡ <> <D1A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > psql< / i > <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӡ<EFBFBD> <D3A1> ִ<EFBFBD> <D6B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > psql< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> ʵ<EFBFBD> <EFBFBD> ʹ <EFBFBD> õ<EFBFBD> SQL<EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> PostgreSQLҲ<EFBFBD> ṩ<EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> SQL<EFBFBD> <EFBFBD> INFORMATION SCHEMA<4D> ӿڣ<D3BF>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> Դ<EFBFBD> <D4B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2>
< / p >
< p >
<09> <> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> < i > pg_< / i > <20> <> ͷ<EFBFBD> <CDB7> ϵͳ<CFB5> <CDB3> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> ˱<EFBFBD> <CBB1> Ķ<EFBFBD> <C4B6> 塣
< / p >
< p >
ʹ <> <CAB9> < i > psql -l< / i > ָ<> <D6B8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> г <EFBFBD> <D0B3> <EFBFBD> <EFBFBD> е <EFBFBD> <D0B5> <EFBFBD> <EFBFBD> ݿ⡣
< / p >
< p >
Ҳ<> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> < i > pgsql/src/tutorial/syscat.source< / i > <EFBFBD> ļ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> о <EFBFBD> <EFBFBD> ˺ܶ<EFBFBD> <EFBFBD> ɴ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> ϵͳ<EFBFBD> <EFBFBD> <EFBFBD> л<EFBFBD> ȡ<EFBFBD> <EFBFBD> Ϣ<EFBFBD> <EFBFBD> SELECT<EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.3" > < / a > 4.3)<29> <> <EFBFBD> θ<EFBFBD> <CEB8> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ֶε<D6B6> <CEB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͣ<EFBFBD> < / h4 >
< p >
<09> <> 8.0<EFBFBD> 汾<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> <EFBFBD> ֶε<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͺ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ף<EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <EFBFBD> ALTER TABLE ALTER COLUMN TYPE <20> <>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> ǰ<EFBFBD> İ汾<C4B0> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< pre >
BEGIN;
ALTER TABLE tab ADD COLUMN new_col new_data_type;
UPDATE tab SET new_col = CAST(old_col AS new_data_type);
ALTER TABLE tab DROP COLUMN old_col;
COMMIT;
< / pre >
< p >
<09> <> Ȼ<EFBFBD> <C8BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> < i > VACUUM FULL tab < / i > ָ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> ջ<EFBFBD> <EFBFBD> <EFBFBD> Ч<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ռ <EFBFBD> õĿռ
< / p >
< h4 > < a name = "4.4" > < / a > 4.4)һ <> м<EFBFBD> ¼<EFBFBD> <C2BC> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ <EFBFBD> <DFB4> Ƕ<EFBFBD> <C7B6> ٣<EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> <EFBFBD> ƣ<EFBFBD>
< / p >
< blockquote >
< table >
< tbody >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ < / td > < td > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> <EFBFBD> Ѵ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 32TB <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ݿ⣩< / td > < / tr >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ < / td > < td > 32 TB< / td > < / tr >
< tr > < td > һ <EFBFBD> м<EFBFBD> ¼<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ < / td > < td > 1.6 TB< / td > < / tr >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> ֶε<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ <EFBFBD> ?< / td > < td > 1 GB< / td > < / tr >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < td > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < / tr >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < td > 250-1600 <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> йأ<D0B9> < / td > < / tr >
< tr > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < td > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < / tr >
< / tbody >
< / table >
< / blockquote >
< p >
<09> <> Ȼ<EFBFBD> <C8BB> ʵ<EFBFBD> <CAB5> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> <C6A3> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> ܿ<EFBFBD> <DCBF> ô<EFBFBD> <C3B4> ̿ռ <D5BC> <E4A1A2> <EFBFBD> <EFBFBD> <EFBFBD> ڴ<EFBFBD> /<2F> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Լ<EFBFBD> <D4BC>
<09> <> ʵ<EFBFBD> ϣ<EFBFBD> <CFA3> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> 쳣<EFBFBD> ش<EFBFBD> ʱ<EFBFBD> <CAB1> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> ܴܺ<DCBA> Ӱ<EFBFBD> 졣
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ߴ <EFBFBD> 32 TB <20> <> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> <EFBFBD> ϵͳ<CFB5> Դ<EFBFBD> <D4B4> ļ<EFBFBD> <C4BC> <EFBFBD> ֧<EFBFBD> ֡<EFBFBD> <D6A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ö<EFBFBD> <C3B6> <EFBFBD> 1 GB <20> <> <EFBFBD> ļ<EFBFBD> <C4BC> 洢<EFBFBD> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> ϵͳ<CFB5> ߴ <EFBFBD> <DFB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Dz<EFBFBD> <C7B2> <EFBFBD> Ҫ<EFBFBD> ġ<EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> ȱʡ<C8B1> Ŀ<EFBFBD> <C4BF> <EFBFBD> С <EFBFBD> <D0A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 32K <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ı <EFBFBD> <C4B1> ߴ <EFBFBD> <DFB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӵ<EFBFBD> <D3B5> ı <EFBFBD> <C4B1> <EFBFBD>
< / p >
< h4 > < a name = "4.5" > < / a > 4.5)<29> 洢һ <E6B4A2> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> ͵<EFBFBD> <CDB5> ı <EFBFBD> <C4B1> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> <EFBFBD> ٴ<EFBFBD> <D9B4> ̿ռ < / h4 >
< p >
һ <> <D2BB> Postgres <20> <> <EFBFBD> ݿ⣨<DDBF> 洢һ <E6B4A2> <D2BB> <EFBFBD> ı <EFBFBD> <C4B1> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> ռ <EFBFBD> õĿռ <C4BF> <D5BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> ൱<EFBFBD> <E0B5B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ı <EFBFBD> <C4B1> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> С <D0A1> <35> <EFBFBD> Ĵ<EFBFBD> <C4B4> ̿ռ
< / p >
< p >
<09> <> <EFBFBD> 磬<EFBFBD> <E7A3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> 100,000 <20> е <EFBFBD> <D0B5> ļ<EFBFBD> <C4BC> <EFBFBD> ÿ<EFBFBD> <C3BF> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ı <EFBFBD> <C4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> ı <EFBFBD> <C4B1> <EFBFBD> <EFBFBD> <EFBFBD> ƽ <EFBFBD> <C6BD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ20<32> ֽڡ<D6BD> <DAA1> ı <EFBFBD> <C4B1> ļ<EFBFBD> ռ <EFBFBD> <D5BC> 2.8 MB<4D> <42> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> ݵ<EFBFBD> PostgreSQL <20> <> <EFBFBD> ݿ<EFBFBD> <DDBF> ļ<EFBFBD> <C4BC> <EFBFBD> Լ<EFBFBD> <D4BC> 6.4 MB:
< / p >
< pre >
32 <20> ֽ<EFBFBD> : ÿ<> е <EFBFBD> ͷ<EFBFBD> <CDB7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֵ<EFBFBD> <D6B5>
24 <20> ֽ<EFBFBD> : һ <> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶκ<D6B6> һ <EFBFBD> <D2BB> <EFBFBD> ı <EFBFBD> <C4B1> <EFBFBD> <EFBFBD> ֶ<EFBFBD>
+ 4 <20> ֽ<EFBFBD> : ҳ<> <D2B3> <EFBFBD> <EFBFBD> ָ<EFBFBD> <D6B8> Ԫ<EFBFBD> <D4AA> <EFBFBD> <EFBFBD> ָ<EFBFBD> <D6B8>
----------------------------------------
60 <20> ֽ<EFBFBD> ÿ<EFBFBD> <C3BF>
PostgreSQL <20> <> <EFBFBD> <EFBFBD> ҳ<EFBFBD> Ĵ<EFBFBD> С <EFBFBD> <D0A1> 8192 <20> ֽ<EFBFBD> (8 KB)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
8192 <20> ֽ<EFBFBD> ÿҳ
------------------- = 136 <20> <> /<2F> <> <EFBFBD> <EFBFBD> ҳ<EFBFBD> <D2B3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD>
60 <20> ֽ<EFBFBD> ÿ<EFBFBD> <C3BF>
100000 <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
-------------------- = 735 <20> <> <EFBFBD> <EFBFBD> ҳ<EFBFBD> <D2B3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD>
128 <20> <> ÿҳ
735 <20> <> <EFBFBD> <EFBFBD> ҳ * 8192 <20> ֽ<EFBFBD> /ҳ = 6,021,120 <20> ֽڣ<D6BD> 6 MB<4D> <42>
< / pre >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> ô<EFBFBD> <C3B4> <EFBFBD> Ķ<EFBFBD> <C4B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ģ<EFBFBD> <C4A3> <EFBFBD> Ҳȷʵ<C8B7> <CAB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <DDA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> ܴܺ<DCBA> <DCB4> <EFBFBD>
< / p >
< p >
<09> <> ֵ< i > NULL< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> λͼ<EFBFBD> У <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ռ <EFBFBD> ú<EFBFBD> <EFBFBD> ٵĿռ
< / p >
< h4 > < a name = "4.6" > < / a > 4.6)Ϊʲô<CAB2> ҵIJ<D2B5> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊʲô<CAB2> <C3B4> Щ<EFBFBD> <D0A9> ѯû<D1AF> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> ÿ<EFBFBD> <C3BF> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> Զ<EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֻ<EFBFBD> <D6BB> <EFBFBD> ڱ<EFBFBD> <DAB1> Ĵ<EFBFBD> С <EFBFBD> <D0A1> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> С <D0A1> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> ѯֻ<D1AF> <D6BB> ѡ <EFBFBD> б <EFBFBD> <D0B1> н<EFBFBD> С <EFBFBD> <D0A1> <EFBFBD> <EFBFBD> <EFBFBD> ļ<EFBFBD> ¼ʱ<C2BC> Ż<EFBFBD> <C5BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> <EFBFBD> <EFBFBD> ɨ<EFBFBD> <C9A8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 漴<EFBFBD> <E6BCB4> <EFBFBD> ̴<EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> ܱ<EFBFBD> ֱ<EFBFBD> ӵض<D3B5> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> ˳<EFBFBD> <CBB3> ɨ<EFBFBD> 裩<EFBFBD> <E8A3A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< p >
Ϊ<> <CEAA> <EFBFBD> ж<EFBFBD> <D0B6> Ƿ<EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> йر<D0B9> <D8B1> <EFBFBD> ͳ<EFBFBD> <CDB3> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> Щͳ<D0A9> <CDB3> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> VACUUM ANALYZE<5A> <45> <EFBFBD> <EFBFBD> ANALYZE <20> <> <EFBFBD> á<EFBFBD>
ʹ <> <CAB9> ͳ<EFBFBD> <CDB3> ֵ<EFBFBD> <D6B5> <EFBFBD> Ż<EFBFBD> <C5BB> <EFBFBD> ֪<EFBFBD> <D6AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ж<EFBFBD> <D0B6> <EFBFBD> <EFBFBD> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> ܹ<EFBFBD> <DCB9> <EFBFBD> <EFBFBD> õ<EFBFBD> <C3B5> ж<EFBFBD> <D0B6> Ƿ<EFBFBD> <C7B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
ͳ<> <CDB3> ֵ<EFBFBD> <D6B5> ȷ<EFBFBD> <C8B7> <EFBFBD> Ż<EFBFBD> <C5BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˳<EFBFBD> <CBB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӷ<EFBFBD> <D3B7> <EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> á<EFBFBD> <C3A1> ڱ<EFBFBD> <DAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݷ<EFBFBD> <DDB7> <EFBFBD> <EFBFBD> 仯ʱ<E4BBAF> <CAB1> Ӧ<EFBFBD> <D3A6> <EFBFBD> ڽ<EFBFBD> <DABD> <EFBFBD> ͳ<EFBFBD> <CDB3> ֵ<EFBFBD> ĸ<EFBFBD> <C4B8> <EFBFBD> <EFBFBD> ռ <EFBFBD> <D5BC> <EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ORDER BY <20> <> ִ<EFBFBD> <D6B4> <EFBFBD> <EFBFBD> <EFBFBD> ӡ<EFBFBD> <D3A1> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> ˳<EFBFBD> <CBB3> ɨ<EFBFBD> 裬<EFBFBD> <E8A3AC> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɨ<EFBFBD> <C9A8> Ҫ<EFBFBD> 졣
< / p >
< p >
<09> <> <EFBFBD> ǣ<EFBFBD> <C7A3> <EFBFBD> LIMIT <20> <> ORDER BY <20> <> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> ֻ<EFBFBD> ᷵<EFBFBD> ر<EFBFBD> <D8B1> <EFBFBD> һ С <D2BB> <D0A1> <EFBFBD> ֡<EFBFBD>
ʵ<> <CAB5> <EFBFBD> ϣ<EFBFBD> <CFA3> <EFBFBD> Ȼ MAX() <20> <> MIN() <20> <> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD>
ORDER BY <20> <> LLIMIT ʹ <> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> С <D6B5> ǿ<EFBFBD> <C7BF> Եģ<D4B5>
< / p >
< pre >
SELECT col
FROM tab
ORDER BY col [ DESC ]
LIMIT 1;
< / pre >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȷ<EFBFBD> <C8B7> PostgreSQL<51> <4C> <EFBFBD> Ż<EFBFBD> <C5BB> <EFBFBD> ʹ <EFBFBD> <CAB9> ˳<EFBFBD> <CBB3> ɨ<EFBFBD> <C9A8> <EFBFBD> Dz<EFBFBD> <C7B2> <EFBFBD> ȷ<EFBFBD> ģ<EFBFBD> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> < code > SET enable_seqscan TO 'off'< / code > ָ<EFBFBD>
Ȼ<> <C8BB> <EFBFBD> ٴ<EFBFBD> <D9B4> <EFBFBD> <EFBFBD> в<EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> <EFBFBD> Ϳ <EFBFBD> <CDBF> Կ<EFBFBD> <D4BF> <EFBFBD> ʹ <EFBFBD> <CAB9> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ɨ<EFBFBD> <C9A8> <EFBFBD> Ƿ<EFBFBD> ȷʵҪ<CAB5> <D2AA> һ <D2BB> <D0A9>
< / p >
< p >
<09> <> ʹ <EFBFBD> <CAB9> ͨ<EFBFBD> <CDA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > LIKE< / i > <20> <> < i > ~< / i > ʱ<> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֻ<EFBFBD> <D6BB> <EFBFBD> <EFBFBD> <EFBFBD> ض<EFBFBD> <D8B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> ã<EFBFBD>
< / p >
< ul >
< li > <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> ʼ <EFBFBD> <EFBFBD> <EFBFBD> ֱ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͨ<EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˵<EFBFBD> <EFBFBD>
< ul >
< li > < i > LIKE< / i > ģʽ <C4A3> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > %< / i > <20> <> ͷ<EFBFBD> <CDB7> < / li >
< li > < i > ~< / i > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> ģʽ <C4A3> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > ^< / i > <20> <> ͷ<EFBFBD> <CDB7> < / li >
< / ul >
< / li >
< li > <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƥ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> ģʽ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͷ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> [a-e]<5D> <> < / li >
< li > <EFBFBD> <EFBFBD> С <EFBFBD> صIJ<EFBFBD> <EFBFBD> ң<EFBFBD> <EFBFBD> <EFBFBD> ILIKE <20> <> ~* <20> Ȳ<EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < a href = "#4.8" > 4.8< / a > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĺ<EFBFBD> <C4BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / li >
< li > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> initdb ʱ<> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȱʡ<C8B1> ı <EFBFBD> <C4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> C locale<6C> <65> <EFBFBD> <EFBFBD> Ϊϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֪<EFBFBD> <D6AA> <EFBFBD> ڷ<EFBFBD> C locale<6C> <65> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <CAB1> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <D6B7> <EFBFBD> ʲô<CAB2> <C3B4>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> £<EFBFBD> <C2A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Դ<EFBFBD> <D4B4> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < code > text_pattern_ops< / code > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < small > LIKE< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / li >
< / ul >
< p >
<09> <> 8.0֮ǰ<EFBFBD> İ汾<EFBFBD> У <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͺ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƥ<EFBFBD> 䣬<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> δ<EFBFBD> <EFBFBD> <EFBFBD> õ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ر<EFBFBD> <EFBFBD> Ƕ<EFBFBD> int2,int8<74> <38> <EFBFBD> <EFBFBD> ֵ<EFBFBD> ͵<EFBFBD> <CDB5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.7" > < / a > 4.7)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> ܿ<EFBFBD> <DCBF> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> Ż<EFBFBD> <C5BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ҵIJ<D2B5> ѯ<EFBFBD> <D1AF> < / h4 >
< p >
<09> ο <EFBFBD> < small > EXPLAIN< / small > <20> ֲ<EFBFBD> ҳ<EFBFBD> <D2B3>
< / p >
< h4 > < a name = "4.8" > < / a > 4.8)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> С <D0A1> ص<DEB9> <D8B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> ң<EFBFBD> <D2A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> д<EFBFBD> С <D0A1> ز<DEB9> <D8B2> ң<EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < i > ~ < / i > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <CABD> 䣬<EFBFBD> <E4A3AC> < i > ~*< / i > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> С <D0A1> ص<DEB9> <D8B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <CABD> 䡣<EFBFBD> <E4A1A3> дЩ<D0B4> ص<DEB9> LIKE <20> <> <EFBFBD> ֳ<EFBFBD> Ϊ ILIKE<4B> <45>
< / p >
< p >
<09> <> С <D0A1> صĵ<D8B5> ʽ <EFBFBD> Ƚ<EFBFBD> ͨ<EFBFBD> <CDA8> д<EFBFBD> <D0B4> <EFBFBD> <EFBFBD>
< / p >
< pre > SELECT *
FROM tab
WHERE lower(col) = 'abc';
< / pre >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> ñ<EFBFBD> <EFBFBD> <D7BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǿ<EFBFBD> <C7BF> Դ<EFBFBD> <D4B4> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ɱ<EFBFBD> <C9B1> <EFBFBD> <EFBFBD> õĺ<C3B5> <C4BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> :
< / p >
< pre > CREATE INDEX tabindex ON tab (lower(col));
< / pre >
< h4 > < a name = "4.9" > < / a > 4.9)<29> <> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> <EFA3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> ֶ<EFBFBD> <D6B6> Ƿ<EFBFBD> Ϊ < i > NULL< / i > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> <EFBFBD> ȷ<D7BC> <C8B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ij<EFBFBD> ֶ<EFBFBD> <D6B6> Ƿ<EFBFBD> <C7B7> <EFBFBD> < i > NULL< / i > ֵ<> <D6B5> < / h4 >
< p >
<09> <> < small > IS NULL< / small > <20> <> < small > IS NOT NULL< / small > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶΣ<D6B6> <CEA3> <EFBFBD> <EFBFBD> 巽<EFBFBD> <E5B7BD> <EFBFBD> <EFBFBD> <EFBFBD> £<EFBFBD>
< / p >
< pre > SELECT *
FROM tab
WHERE col IS NULL;
< / pre >
< p > Ϊ<EFBFBD> <EFBFBD> <EFBFBD> ܶԺ<EFBFBD> < small > NULL< / small > <EFBFBD> ֶ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < small > ORDER BY< / small > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> < small > IS NULL< / small > <EFBFBD> <EFBFBD>
< small > IS NOT NULL< / small > <20> <> <EFBFBD> η<EFBFBD> <CEB7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> < i > true< / i > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϊ<EFBFBD> <CEAA> < i > false< / i > <20> <> <EFBFBD> <EFBFBD> ǰ<EFBFBD> 棬<EFBFBD> <E6A3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӾͻὫ<CDBB> <E1BDAB>
NULL <20> ļ<EFBFBD> ¼<EFBFBD> <C2BC> <EFBFBD> ڽ<EFBFBD> <DABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 沿<EFBFBD> ֣<EFBFBD>
< / p >
< pre > SELECT *
FROM tab
ORDER BY (col IS NOT NULL)
< / pre >
< h4 > < a name = "4.10" > < / a > 4.10)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> ֮<EFBFBD> <D6AE> <EFBFBD> <EFBFBD> ʲô<CAB2> <C3B4> ͬ<EFBFBD> <CDAC> < / h4 >
< blockquote >
< table >
< tbody >
< tr > < th > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / th > < th > <EFBFBD> ڲ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / th > < th > ˵<EFBFBD> <EFBFBD> < / th > < / tr >
< tr > < td > VARCHAR(n)< / td > < td > varchar< / td > < td > ָ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȣ <EFBFBD> <EFBFBD> 䳤<EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 㶨<EFBFBD> 峤<EFBFBD> ȵIJ<EFBFBD> <EFBFBD> ֲ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < / tr >
< tr > < td > CHAR(n)< / td > < td > bpchar< / td > < td > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʵ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݲ<EFBFBD> <EFBFBD> 㶨<EFBFBD> 峤<EFBFBD> <EFBFBD> ʱ<EFBFBD> <EFBFBD> <EFBFBD> Կո <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / td > < / tr >
< tr > < td > TEXT< / td > < td > text< / td > < td > û<EFBFBD> <EFBFBD> <EFBFBD> ر<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƣ<EFBFBD> < / td > < / tr >
< tr > < td > BYTEA< / td > < td > bytea< / td > < td > <EFBFBD> 䳤<EFBFBD> ֽ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> У <EFBFBD> ʹ <EFBFBD> <EFBFBD> NULLҲ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ģ<EFBFBD> < / td > < / tr >
< tr > < td > "char"< / td > < td > char< / td > < td > һ <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> < / td > < / tr >
< / tbody >
< / table >
< / blockquote >
< p >
<09> <> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <D2BB> <D0A9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> <EFBFBD> 㽫<EFBFBD> <E3BDAB> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> <DAB2> <EFBFBD> <EFBFBD> ơ<EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> ǰ<EFBFBD> <C7B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> "varlena"<22> <> <EFBFBD> 䳤<EFBFBD> <E4B3A4> <EFBFBD> <EFBFBD> <EFBFBD> ͣ<EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> ˵<EFBFBD> <CBB5> <EFBFBD> <EFBFBD> ͷ<EFBFBD> <CDB7> <EFBFBD> ĸ<EFBFBD> <C4B8> ֽ<EFBFBD> <D6BD> dz<EFBFBD> <C7B3> ȣ <EFBFBD> <C8A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <DDA3> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> ʵ<EFBFBD> <CAB5> ռ <EFBFBD> õĿռ <C4BF> <D5BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ĵ<EFBFBD> С <D0A1> <D2AA> һ <D2BB> <D0A9>
Ȼ<> <C8BB> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> Ͷ<EFBFBD> <CDB6> <EFBFBD> <EFBFBD> Ա<EFBFBD> ѹ<EFBFBD> <D1B9> <EFBFBD> 洢<EFBFBD> <E6B4A2> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> TOAST <20> ѻ<EFBFBD> <D1BB> 洢<EFBFBD> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> ˴ <EFBFBD> <CBB4> ̿ռ <CCBF> Ҳ<EFBFBD> <D2B2> <EFBFBD> ܱ<EFBFBD> Ԥ<EFBFBD> <D4A4> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> ١ <EFBFBD>
< / p >
< p >
< small > VARCHAR(n)< / small > <20> ڴ洢<DAB4> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȵı <C4B1> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> õġ<C3B5>
< small > TEXT< / small > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ڴ洢<DAB4> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> ɴ<EFBFBD> 1G<31> <47> <EFBFBD> ҵ<EFBFBD> δ<EFBFBD> <CEB4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƴ<EFBFBD> <C6B3> ȵ<EFBFBD> <C8B5> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< p >
< small > CHAR(n)< / small > <20> <> <EFBFBD> ʺ<EFBFBD> <CABA> ڴ洢<DAB4> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͬ<EFBFBD> <CDAC> <EFBFBD> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> < small > CHAR(n)< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶγ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Կո <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 㣨<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <EFBFBD> <EFBFBD>
<09> <> < small > VARCHAR(n)< / small > ֻ<> 洢<EFBFBD> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݡ<EFBFBD>
< small > BYTEA< / small > <20> <> <EFBFBD> ڴ洢<DAB4> <E6B4A2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <DDA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǰ<EFBFBD> <C7B0> <EFBFBD> NULL <20> ֽڵ<D6BD> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> ; <EFBFBD> <CDBE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ƶ<EFBFBD> <C6B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ԡ<EFBFBD>
< / p >
< h4 > < a name = "4.11.1" > < / a > 4.11.1)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> /<2F> Զ<EFBFBD> <D4B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶΣ<D6B6> < / h4 >
< p >
PostgreSQL ֧<> <D6A7> SERIAL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ͡<EFBFBD> <CDA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶ<EFBFBD> <D6B6> <EFBFBD> <EFBFBD> Զ<EFBFBD> <D4B6> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 磺
< / p >
< pre >
CREATE TABLE person (
id SERIAL,
name TEXT
);
< / pre >
< p >
<09> <> <EFBFBD> Զ<EFBFBD> ת<EFBFBD> <D7AA> Ϊ<EFBFBD> <CEAA>
< / p >
< pre >
CREATE SEQUENCE person_id_seq;
CREATE TABLE person (
id INT4 NOT NULL DEFAULT nextval('person_id_seq'),
name TEXT
);
< / pre >
< p >
<09> ο <EFBFBD> create_sequence <20> ֲ<EFBFBD> ҳ<EFBFBD> <D2B3> ȡ<EFBFBD> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <D0B5> <C4B8> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2>
< / p >
< h4 > < a name = "4.11.2" > < / a > 4.11.2)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> λ<EFBFBD> <CEBB> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> кŵ<D0BA> ֵ<EFBFBD> <D6B5> < / h4 >
< p >
һ <> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> <DAB2> <EFBFBD> ֮ǰ<D6AE> <C7B0> <EFBFBD> ú<EFBFBD> <C3BA> <EFBFBD> nextval() <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ж<EFBFBD> <D0B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> SERIAL ֵ<> <D6B5> Ȼ<EFBFBD> <C8BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> 롣ʹ <EBA1A3> <CAB9>
< a href = "#4.11.1" > 4.11.1< / a > <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> α <EFBFBD> <CEB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< pre >
new_id = execute("SELECT nextval('person_id_seq')");
execute("INSERT INTO person (id, name) VALUES (new_id, 'Blaise Pascal')");
< / pre >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> ʹ <EFBFBD> ô<EFBFBD> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> new_id <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> 磬<EFBFBD> <E7A3AC> Ϊ person <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
ע<> <D7A2> <EFBFBD> Զ<EFBFBD> <D4B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> SEQUENCE <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƽ <EFBFBD> <C6BD> <EFBFBD> <EFBFBD> <EFBFBD> < < i > table< / i > > _< < i > serialcolumn< / i > > _< i > seq< / i > <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> table <20> <> serialcolumn <20> ֱ<EFBFBD> <D6B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ı <EFBFBD> <C4B1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ƺ<EFBFBD> <C6BA> <EFBFBD> <EFBFBD> <EFBFBD> SERIAL <20> ֶε<D6B6> <CEB5> <EFBFBD> <EFBFBD> ơ<EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> Ƶģ<C6B5> <C4A3> <EFBFBD> SERIAL <20> <> <EFBFBD> <EFBFBD> ȱʡ<C8B1> <CAA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ú<EFBFBD> <C3BA> <EFBFBD> currval() <20> <> <EFBFBD> <EFBFBD> <EFBFBD> ո <EFBFBD> ֵ<EFBFBD> <D6B5> SERIAL ֵ<> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> 磺
< / p >
< pre >
execute("INSERT INTO person (name) VALUES ('Blaise Pascal')");
new_id = execute("SELECT currval('person_id_seq')");
< / pre >
< h4 > < a name = "4.11.3" > < / a > 4.11.3)ʹ <> <CAB9> < i > currval()< / i > <20> ᵼ<EFBFBD> º<EFBFBD> <C2BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> ij<EFBFBD> ͻ<EFBFBD> <CDBB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> race condition<6F> <6E> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> ᡣ< i > currval()< / i > <20> <> <EFBFBD> ص<EFBFBD> <D8B5> <EFBFBD> <EFBFBD> 㱾<EFBFBD> λỰ<CEBB> <E1BBB0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> û<EFBFBD> <C3BB> ĵ<EFBFBD> ǰֵ<C7B0> <D6B5> < br / >
< / p >
< h4 > < a name = "4.11.4" > < / a > 4.11.4)Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 쳣<EFBFBD> <ECB3A3> ֹ<EFBFBD> <D6B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> أ<EFBFBD> Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> ֶε<D6B6> ȡֵ<C8A1> д<EFBFBD> <D0B4> ڼ<EFBFBD> <DABC> <EFBFBD> <EFBFBD> أ<EFBFBD> < / h4 >
< p >
Ϊ<> <CEAA> <EFBFBD> <EFBFBD> <EFBFBD> ߲<EFBFBD> <DFB2> <EFBFBD> <EFBFBD> ԣ<EFBFBD> <D4A3> <EFBFBD> <EFBFBD> к<EFBFBD> <D0BA> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> <D2AA> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> <D0B5> <EFBFBD> <EFBFBD> <EFBFBD> <F1A3ACB2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֮ǰ<D6AE> <C7B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> ͻᵼ<CDBB> <E1B5BC> <EFBFBD> 쳣<EFBFBD> <ECB3A3> ֹ<EFBFBD> <D6B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> кŻ<D0BA> <C5BB> <EFBFBD> <EFBFBD> ּ<EFBFBD> <D6BC> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < br / > < a name = "4.12" > < / a > 4.12)ʲô<CAB2> <C3B4> < small > OID< / small > <20> <> ʲô<CAB2> <C3B4> < small > CTID< / small > <20> <> < / h4 >
< p >
PostgreSQL <20> ﴴ<EFBFBD> <EFB4B4> <EFBFBD> <EFBFBD> ÿһ <C3BF> м<EFBFBD> ¼<EFBFBD> <C2BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> Ψһ <CEA8> <D2BB> < small > OID< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڴ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʱʹ <EFBFBD> <EFBFBD> < small > WITHOUT OIDS< / small > ѡ <EFBFBD>
< small > OID< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <EFBFBD> <EFBFBD> Զ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <EFBFBD> 4<EFBFBD> ֽڵ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> OID <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> о <EFBFBD> <D0BE> <EFBFBD> Ψһ <CEA8> ġ<EFBFBD> Ȼ<> <C8BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڳ<EFBFBD> <DAB3> <EFBFBD> 40<34> <30> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< small > OID< / small > <EFBFBD> ˺<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ظ<EFBFBD> <EFBFBD> <EFBFBD> PostgreSQL <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڲ<EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> OID <20> ڱ<EFBFBD> ֮<EFBFBD> 佨<EFBFBD> <E4BDA8> <EFBFBD> <EFBFBD> ϵ<EFBFBD> <CFB5>
< / p >
< p >
<09> <> <EFBFBD> û<EFBFBD> <C3BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݱ<EFBFBD> <DDB1> У <EFBFBD> <D0A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> < small > SERIAl< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < small > OID< / small >
<09> <> Ϊ< small > SERIAL< / small > ֻ<EFBFBD> DZ<EFBFBD> ֤<EFBFBD> ڵ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ψһ <EFBFBD> ģ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ŀ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ծͷdz<EFBFBD> С <EFBFBD> ˣ<EFBFBD>
< small > SERIAL8< / small > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 8<EFBFBD> ֽڵ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> к<EFBFBD> <EFBFBD> ֶΡ <EFBFBD>
< / p >
< p >
< small > CTID< / small > <20> <> <EFBFBD> ڱ<EFBFBD> ʶ<EFBFBD> <CAB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ飨<DDBF> <E9A3A8> ַ<EFBFBD> <D6B7> <EFBFBD> ͣ<EFBFBD> <CDA3> <EFBFBD> <EFBFBD> ڣ<EFBFBD> ƫ<EFBFBD> Ƶ<EFBFBD> <C6B5> ض<EFBFBD> <D8B6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> С <EFBFBD>
< small > CTID< / small > <20> ڼ<EFBFBD> ¼<EFBFBD> <C2BC> <EFBFBD> <EFBFBD> <EFBFBD> Ļ<EFBFBD> <C4BB> <EFBFBD> <EFBFBD> غ<EFBFBD> <D8BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ı <C4B1> <E4A1A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ָ<EFBFBD> <D6B8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> С <EFBFBD>
< / p >
< h4 > < a name = "4.13" > < / a > 4.13)Ϊʲô<CAB2> <C3B4> <EFBFBD> յ<EFBFBD> <D5B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> < i > ERROR: Memory exhausted in AllocSetAlloc()< / i > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> ܿ<EFBFBD> <DCBF> <EFBFBD> <EFBFBD> <EFBFBD> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ڴ<EFBFBD> <DAB4> ù<EFBFBD> <C3B9> ˣ<EFBFBD> <CBA3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ں˶<DABA> ijЩ<C4B3> <D0A9> Դ<EFBFBD> нϵ͵<CFB5> <CDB5> <EFBFBD> <EFBFBD> <EFBFBD> ֵ<EFBFBD> <D6B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> postmaster ֮ǰ<D6AE> <C7B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< pre >
ulimit -d 262144
limit datasize 256m
< / pre >
< p >
ȡ<> <C8A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> õ<EFBFBD> shell<6C> <6C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֻ<EFBFBD> <D6BB> һ <EFBFBD> <D2BB> <EFBFBD> ܳɹ<DCB3> <C9B9> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ľ<EFBFBD> <C4BD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݶ<EFBFBD> <DDB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ñȽϸߣ<CFB8>
<09> <> <EFBFBD> <EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> <EFBFBD> ò<EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> ɡ <EFBFBD> <C9A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ӧ<EFBFBD> <D3A6> <EFBFBD> ڵ<EFBFBD> ǰ<EFBFBD> <C7B0> <EFBFBD> ̣<EFBFBD> <CCA3> Լ<EFBFBD> <D4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> к<D0BA> <F3B4B4BD> <EFBFBD> <EFBFBD> ӽ<EFBFBD> <D3BD> ̡<EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> SQL<51> ͻ<EFBFBD> <CDBB> <EFBFBD> ʱ<EFBFBD> <CAB1> Ϊ<EFBFBD> <CEAA> ̨<EFBFBD> <CCA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ̫<EFBFBD> <CCAB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݶ<EFBFBD> <DDB6> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ⣬<EFBFBD> <E2A3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> пͻ<D0BF> <CDBB> <EFBFBD> ֮ǰִ<C7B0> <D6B4> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.14" > < / a > 4.14)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> β<EFBFBD> <CEB2> <EFBFBD> ֪<EFBFBD> <D6AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> е <EFBFBD> PostgreSQL <20> İ汾<C4B0> <E6B1BE> < / h4 >
< p >
<09> <> psql <20> <EFBFBD> <EFA3AC> <EFBFBD> <EFBFBD> < code > SELECT version();< / code > ָ<EFBFBD>
< / p >
< h4 > < a name = "4.15" > < / a > 4.15)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> δ<EFBFBD> <CEB4> <EFBFBD> һ <EFBFBD> <D2BB> ȱʡֵ<CAA1> ǵ<EFBFBD> ǰʱ<C7B0> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> ֶΣ<D6B6> < / h4 >
< p >
ʹ <> <CAB9> CURRENT_TIMESTAMP<4D> <50>
< / p >
< pre >
CREATE TABLE test (x int, modtime TIMESTAMP DEFAULT CURRENT_TIMESTAMP );
< / pre >
< h4 > < a name = "4.16" > < / a > 4.16)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> outer join <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> <D3A3> <EFBFBD> < / h4 >
< p >
PostgreSQL <20> <> <EFBFBD> ñ<EFBFBD> <EFBFBD> <D7BC> SQL <20> ֧<EFB7A8> <D6A7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӡ<EFBFBD> <D3A1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD>
< / p >
< pre >
SELECT *
FROM t1 LEFT OUTER JOIN t2 ON (t1.col = t2.col);
< / pre >
< p > <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> < / p >
< pre >
SELECT *
FROM t1 LEFT OUTER JOIN t2 USING (col);
< / pre >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȼ۵ <DBB5> ѯ<EFBFBD> <D1AF> t1.col <20> <> t2.col <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> <D3A3> <EFBFBD> <EFBFBD> ҷ<EFBFBD> <D2B7> <EFBFBD> t1 <20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> δ<EFBFBD> <CEB4> <EFBFBD> ӵ<EFBFBD> <D3B5> У <EFBFBD> <D0A3> <EFBFBD> Щ<EFBFBD> <D0A9> t2 <20> <> û<EFBFBD> <C3BB> ƥ<EFBFBD> <C6A5> <EFBFBD> <EFBFBD> <EFBFBD> У <EFBFBD> <D0A3> <EFBFBD>
<09> <> [<5B> <> ]<5D> <> <EFBFBD> <EFBFBD> (RIGHT OUTER JOIN)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> t2 <20> <> δ<EFBFBD> <CEB4> <EFBFBD> ӵ<EFBFBD> <D3B5> С <EFBFBD>
<09> <> ȫ<EFBFBD> <C8AB> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> FULL OUTER JOIN<49> <4E> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> t1 <20> <> t2 <20> <> δ<EFBFBD> <CEB4> <EFBFBD> ӵ<EFBFBD> <D3B5> С <EFBFBD>
<09> ؼ<EFBFBD> <D8BC> <EFBFBD> OUTER <20> <> <EFBFBD> <EFBFBD> [<5B> <> ]<5D> <> <EFBFBD> ӡ<EFBFBD> <D3A1> <EFBFBD> [<5B> <> ]<5D> <> <EFBFBD> Ӻ<EFBFBD> <D3BA> <EFBFBD> ȫ[<5B> <> ]<5D> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ǿ<EFBFBD> ѡ <EFBFBD> ģ<EFBFBD> <C4A3> <EFBFBD> ͨ<EFBFBD> <CDA8> <EFBFBD> ӱ<EFBFBD> <D3B1> <EFBFBD> Ϊ<EFBFBD> <CEAA> <EFBFBD> <EFBFBD> <EFBFBD> ӣ<EFBFBD> INNER JOIN<49> <4E> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.17" > < / a > 4.17)<29> <> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> <EFBFBD> 漰<EFBFBD> <E6BCB0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> IJ<EFBFBD> ѯ<EFBFBD> <D1AF> < / h4 >
< p >
û<> а <D0B0> <ECB7A8> ѯ<EFBFBD> <D1AF> ǰ<EFBFBD> <C7B0> <EFBFBD> ݿ<EFBFBD> ֮<EFBFBD> <D6AE> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ⡣
<09> <> Ϊ PostgreSQL Ҫ<> <D2AA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> <EFBFBD> <EFBFBD> ص<EFBFBD> ϵͳĿ¼<C4BF> <C2BC> ϵͳ<CFB5> <CDB3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ˿<EFBFBD> <CBBF> <EFBFBD> <EFBFBD> ݿ<EFBFBD> <DDBF> IJ<EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> ִ<EFBFBD> <D6B4> <EFBFBD> Dz<EFBFBD> <C7B2> <EFBFBD> <EFBFBD> ġ<EFBFBD>
< / p >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֵģ<D6B5> <C4A3> contrib/dblink<6E> <6B> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ú<EFBFBD> <C3BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʵ<EFBFBD> ֿ<EFBFBD> <D6BF> <EFBFBD> <EFBFBD> <EFBFBD> ѯ<EFBFBD> <D1AF> <EFBFBD> <EFBFBD> Ȼ<EFBFBD> û<EFBFBD> Ҳ<EFBFBD> <D2B2> <EFBFBD> <EFBFBD> ͬʱ<CDAC> <CAB1> <EFBFBD> ӵ<EFBFBD> <D3B5> <EFBFBD> ͬ<EFBFBD> <CDAC> <EFBFBD> <EFBFBD> <EFBFBD> ݿ<EFBFBD> ִ<EFBFBD> в<EFBFBD> ѯȻ<D1AF> <C8BB> <EFBFBD> ڿͻ<DABF> <CDBB> ˺ϲ <CBBA> <CFB2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.18" > < / a > 4.18)<29> <> <EFBFBD> <EFBFBD> <EFBFBD> ú<EFBFBD> <C3BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ض<EFBFBD> <D8B6> л<EFBFBD> <D0BB> <EFBFBD> <EFBFBD> У <EFBFBD> < / h4 >
< p >
<09> ں<EFBFBD> <DABA> <EFBFBD> <EFBFBD> з<EFBFBD> <D0B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݼ<EFBFBD> ¼<EFBFBD> <C2BC> <EFBFBD> Ĺ<EFBFBD> <C4B9> <EFBFBD> <EFBFBD> Ǻ<EFBFBD> <C7BA> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> õģ<C3B5> <C4A3> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> μ<EFBFBD> <CEBC> <EFBFBD>
< a href = "http://techdocs.postgresql.org/guides/SetReturningFunctions" > http://techdocs.postgresql.org/guides/SetReturningFunctions< / a >
< / p >
< h4 > < a name = "4.19" > < / a > 4.19)Ϊʲô<CAB2> <C3B4> <EFBFBD> <EFBFBD> ʹ <EFBFBD> <CAB9> PL/PgSQL<51> <4C> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ȡ<EFBFBD> <C8A1> ʱ<EFBFBD> <CAB1> ʱ<EFBFBD> <CAB1> <EFBFBD> յ<EFBFBD> <D5B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ<EFBFBD> <CFA2> relation with OID ##### does not exist<73> <74> <EFBFBD> <EFBFBD> < / h4 >
< p >
PL/PgSQL<51> Ỻ<EFBFBD> 溯<EFBFBD> <E6BAAF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݣ<EFBFBD> <DDA3> ɴ˴ <C9B4> <CBB4> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> õĸ<C3B5> <C4B8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> PL/PgSQL
<20> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> Ȼ<EFBFBD> <C8BB> <EFBFBD> ñ<EFBFBD> <C3B1> <EFBFBD> ɾ<EFBFBD> <C9BE> <EFBFBD> <EFBFBD> <EFBFBD> ؽ<EFBFBD> <D8BD> ˣ<EFBFBD> <CBA3> <EFBFBD> <EFBFBD> ٴε<D9B4> <CEB5> øú<C3B8> <C3BA> <EFBFBD> <EFBFBD> <EFBFBD> ʧ<EFBFBD> ܣ<EFBFBD>
<09> <> Ϊ<EFBFBD> <CEAA> <EFBFBD> <EFBFBD> <EFBFBD> ĺ<EFBFBD> <C4BA> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ȼָ<C8BB> <D6B8> <EFBFBD> ɵ<EFBFBD> <C9B5> <EFBFBD> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ķ<EFBFBD> <C4B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> PL/PgSQL <20> <> <EFBFBD> <EFBFBD> < small > EXECUTE< / small >
<20> <> <EFBFBD> <EFBFBD> ʱ<EFBFBD> <CAB1> <EFBFBD> <EFBFBD> <EFBFBD> з<EFBFBD> <D0B7> ʡ<EFBFBD> <CAA1> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ᱣ֤<E1B1A3> <D6A4> ѯ<EFBFBD> <D1AF> ִ<EFBFBD> <D6B4> ǰ<EFBFBD> ܻᱻ<DCBB> <E1B1BB> <EFBFBD> ½<EFBFBD> <C2BD> <EFBFBD> <EFBFBD> <EFBFBD>
< / p >
< h4 > < a name = "4.27" > < / a > 4.27)Ŀǰ<C4BF> <C7B0> <EFBFBD> <EFBFBD> Щ<EFBFBD> <D0A9> <EFBFBD> ݸ<EFBFBD> <DDB8> Ʒ <EFBFBD> <C6B7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ã<EFBFBD> < / h4 >
< p >
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> ơ<EFBFBD> ֻ<EFBFBD> <D6BB> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> кü<D0BA> <C3BC> ָ<EFBFBD> <D6B8> Ƽ <EFBFBD> <C6BC> <EFBFBD> <EFBFBD> <EFBFBD> ʹ <EFBFBD> ã<EFBFBD> ÿ<EFBFBD> ֶ<EFBFBD> <D6B6> <EFBFBD> <EFBFBD> ŵ<EFBFBD> <C5B5> <EFBFBD> ȱ<EFBFBD> 㣺
< / p >
< p >
<09> <> /<2F> Ӹ<EFBFBD> <D3B8> Ʒ <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ܶ<EFBFBD> /д<> <D0B4> <EFBFBD> <EFBFBD> <EFBFBD> 룬<EFBFBD> <EBA3AC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ӷ<EFBFBD> <D3B7> <EFBFBD> <EFBFBD> <EFBFBD> ֻ<EFBFBD> ܽ<EFBFBD> <DCBD> ܶ<EFBFBD> /< small > SELECT< / small > <EFBFBD> <EFBFBD> ѯ<EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> 룬
Ŀǰ<C4BF> <C7B0> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ѵ <EFBFBD> <D1B5> <EFBFBD> /<2F> <> PostgreSQL<51> <4C> <EFBFBD> Ʒ <EFBFBD> <C6B7> <EFBFBD> <EFBFBD> <EFBFBD>
< a href = "http://gborg.postgresql.org/project/slony1/projdisplay.php" > Slony-I < / a > <EFBFBD> <EFBFBD>
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<09> <> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ĸ<EFBFBD> <C4B8> Ʒ <EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> /д<> <D0B4> <EFBFBD> <EFBFBD> <EFBFBD> 뷢<EFBFBD> <EFBFBD> <CDB8> <EFBFBD> ̨<EFBFBD> ļ<EFBFBD> <C4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> ʽ <EFBFBD> <CABD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ҫ<EFBFBD> ڶ<EFBFBD> ̨<EFBFBD> <CCA8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֮<EFBFBD> <D6AE> ͬ<EFBFBD> <CDAC> <EFBFBD> <EFBFBD> <EFBFBD> ݱ䶯
<09> <> <EFBFBD> ܻ<EFBFBD> <DCBB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ص<EFBFBD> <D8B5> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ʧ<EFBFBD> <CAA7> < a href = "http://pgfoundry.org/projects/pgcluster/" > Pgcluster< / a > <EFBFBD> <EFBFBD> Ŀǰ<EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <EFBFBD> <EFBFBD>
<09> <> <EFBFBD> <EFBFBD> <EFBFBD> õģ<C3B5> <C4A3> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ء<EFBFBD>
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Ҳ<> <D2B2> һ <D2BB> <D0A9> ҵ<EFBFBD> 踶<EFBFBD> Ѻͻ<D1BA> <CDBB> <EFBFBD> Ӳ<EFBFBD> <D3B2> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݸ<EFBFBD> <DDB8> Ʒ <EFBFBD> <C6B7> <EFBFBD> <EFBFBD> <EFBFBD> ֧<EFBFBD> <D6A7> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ָ<EFBFBD> <D6B8> <EFBFBD> ģ<EFBFBD> ͡<EFBFBD>
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