{"id":186446,"date":"2024-11-11T05:59:21","date_gmt":"2024-11-10T21:59:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186446\/"},"modified":"2024-11-11T05:59:22","modified_gmt":"2024-11-10T21:59:22","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%bf%e6%95%b4%e6%89%80%e9%81%b5%e5%be%aa%e7%9a%84%e9%96%8b%e9%96%89%e5%8e%9f%e5%89%87%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186446\/","title":{"rendered":"\u6578\u64da\u5eab\u8abf\u6574\u6240\u9075\u5faa\u7684\u201c\u958b\u9589\u539f\u5247\u201d\u7c21\u4ecb"},"content":{"rendered":"

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\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u5c0d\u65bc\u4f01\u696d\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002\u6578\u64da\u5eab\u8abf\u6574\uff08Database Tuning\uff09\u662f\u4e00\u500b\u91cd\u8981\u7684\u904e\u7a0b\uff0c\u65e8\u5728\u512a\u5316\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u4ee5\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u696d\u52d9\u9700\u6c42\u3002\u5728\u9019\u500b\u904e\u7a0b\u4e2d\uff0c\u201c\u958b\u9589\u539f\u5247\u201d\uff08Open\/Closed Principle\uff09\u662f\u4e00\u500b\u503c\u5f97\u95dc\u6ce8\u7684\u6982\u5ff5\uff0c\u9019\u4e00\u539f\u5247\u6e90\u81ea\u65bc\u8edf\u4ef6\u5de5\u7a0b\uff0c\u7279\u5225\u662f\u5728\u9762\u5411\u5c0d\u8c61\u7684\u8a2d\u8a08\u4e2d\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u8abf\u6574\u4e2d\u7684\u958b\u9589\u539f\u5247\u53ca\u5176\u61c9\u7528\u3002<\/p>\n

\u958b\u9589\u539f\u5247\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u958b\u9589\u539f\u5247\u662f\u6307\u201c\u8edf\u4ef6\u5be6\u9ad4\uff08\u985e\u3001\u6a21\u7d44\u3001\u51fd\u6578\u7b49\uff09\u61c9\u8a72\u5c0d\u64f4\u5c55\u958b\u653e\uff0c\u5c0d\u4fee\u6539\u95dc\u9589\u201d\u3002\u9019\u610f\u5473\u8457\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\uff0c\u61c9\u8a72\u80fd\u5920\u901a\u904e\u6dfb\u52a0\u65b0\u529f\u80fd\u4f86\u64f4\u5c55\u7cfb\u7d71\uff0c\u800c\u4e0d\u9700\u8981\u4fee\u6539\u73fe\u6709\u7684\u4ee3\u78bc\u3002\u9019\u4e00\u539f\u5247\u7684\u76ee\u7684\u662f\u63d0\u9ad8\u7cfb\u7d71\u7684\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u64f4\u5c55\u6027\u3002<\/p>\n

\u6578\u64da\u5eab\u8abf\u6574\u4e2d\u7684\u958b\u9589\u539f\u5247<\/h2>\n

\u5728\u6578\u64da\u5eab\u8abf\u6574\u4e2d\uff0c\u958b\u9589\u539f\u5247\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\uff08DBA\uff09\u5728\u4e0d\u5f71\u97ff\u73fe\u6709\u7cfb\u7d71\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u6027\u80fd\u512a\u5316\u3002\u4ee5\u4e0b\u662f\u5e7e\u500b\u61c9\u7528\u958b\u9589\u539f\u5247\u7684\u5177\u9ad4\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528\u8996\u5716\uff08Views\uff09<\/h3>\n

\u8996\u5716\u662f\u4e00\u7a2e\u865b\u64ec\u8868\uff0c\u53ef\u4ee5\u6839\u64da\u4e00\u500b\u6216\u591a\u500b\u57fa\u790e\u8868\u7684\u67e5\u8a62\u7d50\u679c\u751f\u6210\u3002\u901a\u904e\u4f7f\u7528\u8996\u5716\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4e0d\u6539\u8b8a\u57fa\u790e\u8868\u7d50\u69cb\u7684\u60c5\u6cc1\u4e0b\uff0c\u63d0\u4f9b\u4e0d\u540c\u7684\u6578\u64da\u8996\u5716\u3002\u4f8b\u5982\uff1a<\/p>\n

CREATE VIEW employee_view AS\nSELECT name, department\nFROM employees\nWHERE status = 'active';\n<\/code><\/pre>\n
\u9019\u6a23\uff0c\u7576\u9700\u8981\u67e5\u8a62\u6d3b\u8e8d\u54e1\u5de5\u7684\u6642\u5019\uff0c\u53ea\u9700\u67e5\u8a62\u8996\u5716\uff0c\u800c\u4e0d\u5fc5\u4fee\u6539\u539f\u59cb\u7684\u6578\u64da\u8868\u7d50\u69cb\u3002<\/p>\n
2. \u512a\u5316\u67e5\u8a62\u800c\u975e\u7d50\u69cb<\/h3>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u8abf\u6574\u6642\uff0c\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\u662f\u63d0\u9ad8\u6027\u80fd\u7684\u4e00\u7a2e\u6709\u6548\u65b9\u6cd5\u3002\u901a\u904e\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0cDBA\u53ef\u4ee5\u627e\u51fa\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u5c0d\u67e5\u8a62\u9032\u884c\u512a\u5316\uff0c\u800c\u4e0d\u5fc5\u6539\u8b8a\u6578\u64da\u5eab\u7684\u7d50\u69cb\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\uff1a<\/p>\n
CREATE INDEX idx_employee_name ON employees(name);\n<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u57fa\u65bc\u54e1\u5de5\u59d3\u540d\u7684\u67e5\u8a62\u901f\u5ea6\uff0c\u800c\u4e0d\u9700\u8981\u6539\u8b8a\u8868\u7684\u7d50\u69cb\u3002<\/p>\n
3. \u4f7f\u7528\u5b58\u5132\u904e\u7a0b\uff08Stored Procedures\uff09<\/h3>\n
\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7d44\u9810\u7de8\u8b6f\u7684SQL\u8a9e\u53e5\uff0c\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u4e2d\u57f7\u884c\u3002\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u53ef\u4ee5\u5c07\u696d\u52d9\u908f\u8f2f\u5c01\u88dd\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5f9e\u800c\u6e1b\u5c11\u61c9\u7528\u7a0b\u5e8f\u8207\u6578\u64da\u5eab\u4e4b\u9593\u7684\u4ea4\u4e92\u6b21\u6578\uff0c\u63d0\u5347\u6027\u80fd\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE PROCEDURE GetActiveEmployees\nAS\nBEGIN\n    SELECT name, department\n    FROM employees\n    WHERE status = 'active';\nEND;\n<\/code><\/pre>\n
\u9019\u6a23\uff0c\u7576\u9700\u8981\u7372\u53d6\u6d3b\u8e8d\u54e1\u5de5\u6642\uff0c\u53ea\u9700\u8abf\u7528\u5b58\u5132\u904e\u7a0b\uff0c\u800c\u4e0d\u5fc5\u6bcf\u6b21\u90fd\u7de8\u5beb\u67e5\u8a62\u8a9e\u53e5\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728\u6578\u64da\u5eab\u8abf\u6574\u904e\u7a0b\u4e2d\uff0c\u9075\u5faa\u958b\u9589\u539f\u5247\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548cDBA\u5728\u4e0d\u5f71\u97ff\u73fe\u6709\u7cfb\u7d71\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u6027\u80fd\u512a\u5316\u3002\u901a\u904e\u4f7f\u7528\u8996\u5716\u3001\u512a\u5316\u67e5\u8a62\u548c\u5b58\u5132\u904e\u7a0b\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7dad\u8b77\u6027\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u9019\u4e9b\u65b9\u6cd5\u5c07\u4f7f\u7cfb\u7d71\u80fd\u5920\u9748\u6d3b\u61c9\u5c0d\u65b0\u7684\u6311\u6230\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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