{"id":179414,"date":"2024-11-09T01:37:18","date_gmt":"2024-11-08T17:37:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179414\/"},"modified":"2024-11-09T01:37:19","modified_gmt":"2024-11-08T17:37:19","slug":"%e5%a6%82%e4%bd%95%e5%84%aa%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%ef%bc%9f30-%e5%ad%97-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179414\/","title":{"rendered":"\u5982\u4f55\u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62\uff1f30 \u5b57 (\u6578\u64da\u5eab\u67e5\u8a62\u512a\u5316\u7b56\u7565)"},"content":{"rendered":"

\u5982\u4f55\u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62\uff1f30 \u5b57 (\u6578\u64da\u5eab\u67e5\u8a62\u512a\u5316\u7b56\u7565)<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u67e5\u8a62\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62\u4e0d\u50c5\u80fd\u63d0\u9ad8\u97ff\u61c9\u901f\u5ea6\uff0c\u9084\u80fd\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\uff0c\u5f9e\u800c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u6709\u6548\u7684\u6578\u64da\u5eab\u67e5\u8a62\u512a\u5316\u7b56\u7565\u3002<\/p>\n

1. \u4f7f\u7528\u7d22\u5f15<\/h2>\n

\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u5de5\u5177\u3002\u901a\u904e\u5728\u8868\u7684\u7279\u5b9a\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002\u7d22\u5f15\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u6578\u64da\u3002<\/p>\n

CREATE INDEX idx_column_name ON table_name (column_name);<\/code><\/pre>\n
\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u6839\u64da\u5be6\u969b\u67e5\u8a62\u9700\u6c42\u8b39\u614e\u9078\u64c7\u7d22\u5f15\u3002<\/p>\n
2. \u512a\u5316\u67e5\u8a62\u8a9e\u53e5<\/h2>\n
\u64b0\u5beb\u9ad8\u6548\u7684\u67e5\u8a62\u8a9e\u53e5\u662f\u512a\u5316\u7684\u53e6\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/p>\n
SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n
\u6b64\u5916\uff0c\u4f7f\u7528JOIN\u800c\u4e0d\u662f\u5b50\u67e5\u8a62\uff0c\u901a\u5e38\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
3. \u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b<\/h2>\n
\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u53ef\u4ee5\u6e1b\u5c11\u5b58\u5132\u7a7a\u9593\u4e26\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u6574\u6578\u6578\u64da\uff0c\u4f7f\u7528INT\u800c\u4e0d\u662fVARCHAR\u53ef\u4ee5\u7bc0\u7701\u7a7a\u9593\u4e26\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n
4. \u5b9a\u671f\u6e05\u7406\u6578\u64da<\/h2>\n
\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u5b9a\u671f\u6e05\u7406\u904e\u671f\u6216\u4e0d\u518d\u4f7f\u7528\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u4e26\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u8ca0\u64d4\u3002<\/p>\n
5. \u4f7f\u7528\u67e5\u8a62\u7de9\u5b58<\/h2>\n
\u67e5\u8a62\u7de9\u5b58\u53ef\u4ee5\u5b58\u5132\u5e38\u7528\u67e5\u8a62\u7684\u7d50\u679c\uff0c\u5f9e\u800c\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u7684\u8acb\u6c42\u3002\u9019\u5c0d\u65bc\u8b80\u53d6\u983b\u7e41\u7684\u6578\u64da\u7279\u5225\u6709\u6548\u3002<\/p>\n
6. \u5206\u5340\u8868<\/h2>\n
\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528\u5206\u5340\u8868\u3002\u901a\u904e\u5c07\u6578\u64da\u5206\u6210\u66f4\u5c0f\u7684\u90e8\u5206\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u56e0\u70ba\u6578\u64da\u5eab\u53ea\u9700\u6383\u63cf\u76f8\u95dc\u7684\u5206\u5340\u3002<\/p>\n
7. \u76e3\u63a7\u548c\u5206\u6790\u67e5\u8a62\u6027\u80fd<\/h2>\n
\u4f7f\u7528\u6578\u64da\u5eab\u63d0\u4f9b\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5b9a\u671f\u5206\u6790\u67e5\u8a62\u6027\u80fd\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u74f6\u9838\u548c\u6f5b\u5728\u7684\u512a\u5316\u6a5f\u6703\u3002<\/p>\n
8. \u9069\u7576\u7684\u786c\u9ad4\u914d\u7f6e<\/h2>\n
\u6700\u5f8c\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u904b\u884c\u5728\u9069\u7576\u7684\u786c\u9ad4\u4e0a\u3002\u8db3\u5920\u7684\u5167\u5b58\u548c\u5feb\u901f\u7684\u786c\u789f\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u512a\u5316\u6578\u64da\u5eab\u67e5\u8a62\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\uff0c\u6d89\u53ca\u591a\u65b9\u9762\u7684\u8003\u91cf\u3002\u901a\u904e\u4f7f\u7528\u7d22\u5f15\u3001\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\u3001\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3001\u5b9a\u671f\u6e05\u7406\u6578\u64da\u3001\u4f7f\u7528\u67e5\u8a62\u7de9\u5b58\u3001\u5206\u5340\u8868\u3001\u76e3\u63a7\u6027\u80fd\u4ee5\u53ca\u9069\u7576\u7684\u786c\u9ad4\u914d\u7f6e\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 \u9999\u6e2fVPS<\/a> \u6216 \u96f2\u4f3a\u670d\u5668<\/a> \u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u5c07\u70ba\u6578\u64da\u5eab\u7684\u904b\u884c\u63d0\u4f9b\u7a69\u5b9a\u7684\u57fa\u790e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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