{"id":186246,"date":"2024-11-11T04:19:17","date_gmt":"2024-11-10T20:19:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186246\/"},"modified":"2024-11-11T04:19:18","modified_gmt":"2024-11-10T20:19:18","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e7%9a%84%e8%97%9d%e8%a1%93%ef%bc%9a%e7%b2%be%e9%80%9apostgresql%e7%9a%84%e6%a2%9d%e4%bb%b6%e9%81%8e%e6%bf%be%e5%92%8c%e6%8e%92%e5%ba%8f%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186246\/","title":{"rendered":"\u6578\u64da\u5eab\u67e5\u8a62\u7684\u85dd\u8853\uff1a\u7cbe\u901aPostgreSQL\u7684\u689d\u4ef6\u904e\u6ffe\u548c\u6392\u5e8f\u6280\u5de7"},"content":{"rendered":"

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\u689d\u4ef6\u904e\u6ffe\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

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SELECT * FROM employees WHERE age > 30;<\/code><\/pre>\n
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\u4f7f\u7528LIKE\u9032\u884c\u6a21\u5f0f\u5339\u914d<\/h2>\n
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SELECT * FROM employees WHERE name LIKE 'J%';<\/code><\/pre>\n
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\u6392\u5e8f\u6578\u64da\u7684\u6280\u5de7<\/h2>\n
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SELECT * FROM employees ORDER BY age ASC;<\/code><\/pre>\n
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SELECT * FROM employees ORDER BY department, age DESC;<\/code><\/pre>\n
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\u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd<\/h2>\n
\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u67e5\u8a62\u6027\u80fd\u53ef\u80fd\u6703\u6210\u70ba\u74f6\u9838\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0cPostgreSQL\u5141\u8a31\u7528\u6236\u5275\u5efa\u7d22\u5f15\u3002\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528WHERE\u5b50\u53e5\u9032\u884c\u904e\u6ffe\u6642\u3002\u4ee5\u4e0b\u662f\u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n
CREATE INDEX idx_age ON employees(age);<\/code><\/pre>\n
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\u7d50\u8ad6<\/h2>\n
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\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684PostgreSQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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