{"id":180600,"date":"2024-11-09T11:37:19","date_gmt":"2024-11-09T03:37:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180600\/"},"modified":"2024-11-09T11:37:20","modified_gmt":"2024-11-09T03:37:20","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95%e6%9c%80%e5%b7%a6%e5%8e%9f%e5%89%87%e7%9a%84%e4%bd%9c%e7%94%a8%e8%88%87%e5%8e%9f%e7%90%86-%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180600\/","title":{"rendered":"\u6df1\u5165\u89e3\u6790\uff1a\u6578\u64da\u5eab\u7d22\u5f15\u6700\u5de6\u539f\u5247\u7684\u4f5c\u7528\u8207\u539f\u7406 (\u6578\u64da\u5eab\u7d22\u5f15\u6700\u5de6\u539f\u5247\u662f\u4ec0\u9ebc)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95%e6%9c%80%e5%b7%a6%e5%8e%9f%e5%89%87%e7%9a%84%e4%bd%9c%e7%94%a8%e8%88%87%e5%8e%9f%e7%90%86-afclYPqxxl\">\u6df1\u5165\u89e3\u6790\uff1a\u6578\u64da\u5eab\u7d22\u5f15\u6700\u5de6\u539f\u5247\u7684\u4f5c\u7528\u8207\u539f\u7406<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u7d22\u5f15\u7684\u4f7f\u7528\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6578\u64da\u5eab\u7d22\u5f15\u4e2d\u7684\u6700\u5de6\u539f\u5247\uff0c\u4e26\u5206\u6790\u5176\u4f5c\u7528\u8207\u539f\u7406\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95%e6%9c%80%e5%b7%a6%e5%8e%9f%e5%89%87%ef%bc%9f-afclYPqxxl\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u7d22\u5f15\u6700\u5de6\u539f\u5247\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u7d22\u5f15\u6700\u5de6\u539f\u5247\u662f\u6307\u5728\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u6642\uff0c\u67e5\u8a62\u689d\u4ef6\u5fc5\u9808\u5f9e\u7d22\u5f15\u7684\u6700\u5de6\u5074\u958b\u59cb\u5339\u914d\u3002\u9019\u610f\u5473\u8457\uff0c\u5982\u679c\u4e00\u500b\u7d22\u5f15\u662f\u7531\u591a\u500b\u5217\u7d44\u6210\u7684\uff0c\u67e5\u8a62\u8a9e\u53e5\u4e2d\u5fc5\u9808\u9996\u5148\u4f7f\u7528\u7d22\u5f15\u7684\u7b2c\u4e00\u5217\uff0c\u7136\u5f8c\u624d\u80fd\u4f7f\u7528\u7b2c\u4e8c\u5217\uff0c\u4f9d\u6b64\u985e\u63a8\u3002\u9019\u4e00\u539f\u5247\u5c0d\u65bc\u512a\u5316\u67e5\u8a62\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e6%9c%80%e5%b7%a6%e5%8e%9f%e5%89%87%e7%9a%84%e4%bd%9c%e7%94%a8-afclYPqxxl\">\u6700\u5de6\u539f\u5247\u7684\u4f5c\u7528<\/h2>\n<p>\u6700\u5de6\u539f\u5247\u7684\u4e3b\u8981\u4f5c\u7528\u5728\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u7576\u6578\u64da\u5eab\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u82e5\u80fd\u5229\u7528\u7d22\u5f15\uff0c\u5247\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\uff0c\u800c\u4e0d\u5fc5\u6383\u63cf\u6574\u500b\u8868\u3002\u4ee5\u4e0b\u662f\u6700\u5de6\u539f\u5247\u7684\u5e7e\u500b\u5177\u9ad4\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li><strong>\u52a0\u901f\u67e5\u8a62\uff1a<\/strong>\u901a\u904e\u6700\u5de6\u539f\u5247\uff0c\u6578\u64da\u5eab\u80fd\u5920\u66f4\u5feb\u5730\u627e\u5230\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u884c\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\uff1a<\/strong>\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u6e1b\u5c11CPU\u548cI\/O\u7684\u4f7f\u7528\uff0c\u5f9e\u800c\u964d\u4f4e\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d88\u8017\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u4e26\u767c\u6027\u80fd\uff1a<\/strong>\u7576\u591a\u500b\u7528\u6236\u540c\u6642\u67e5\u8a62\u6578\u64da\u6642\uff0c\u7d22\u5f15\u80fd\u5920\u6709\u6548\u5730\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u4e26\u767c\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e5%b7%a6%e5%8e%9f%e5%89%87%e7%9a%84%e5%8e%9f%e7%90%86-afclYPqxxl\">\u6700\u5de6\u539f\u5247\u7684\u539f\u7406<\/h2>\n<p>\u70ba\u4e86\u7406\u89e3\u6700\u5de6\u539f\u5247\u7684\u539f\u7406\uff0c\u6211\u5011\u53ef\u4ee5\u8003\u616e\u4e00\u500b\u4f8b\u5b50\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5305\u542b\u4e09\u500b\u5217\u7684\u8907\u5408\u7d22\u5f15\uff1a<code>(A, B, C)<\/code>\u3002\u6839\u64da\u6700\u5de6\u539f\u5247\uff0c\u4ee5\u4e0b\u67e5\u8a62\u5c07\u80fd\u5920\u6709\u6548\u5229\u7528\u8a72\u7d22\u5f15\uff1a<\/p>\n<pre><code>SELECT * FROM table WHERE A = 'value1' AND B = 'value2';\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u9996\u5148\u4f7f\u7528\u4e86\u7d22\u5f15\u7684\u7b2c\u4e00\u5217 <code>A<\/code>\uff0c\u7136\u5f8c\u662f\u7b2c\u4e8c\u5217 <code>B<\/code>\u3002\u9019\u6a23\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u5229\u7528\u7d22\u5f15\u5feb\u901f\u5b9a\u4f4d\u5230\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u884c\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5982\u679c\u67e5\u8a62\u8a9e\u53e5\u662f\uff1a<\/p>\n<pre><code>SELECT * FROM table WHERE B = 'value2' AND C = 'value3';\n<\/code><\/pre>\n<p>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u7531\u65bc\u67e5\u8a62\u6c92\u6709\u5f9e\u7d22\u5f15\u7684\u6700\u5de6\u5074\u958b\u59cb\uff08\u5373\u6c92\u6709\u4f7f\u7528 <code>A<\/code>\uff09\uff0c\u56e0\u6b64\u6578\u64da\u5eab\u5c07\u7121\u6cd5\u6709\u6548\u5229\u7528\u8a72\u7d22\u5f15\uff0c\u53ef\u80fd\u9700\u8981\u9032\u884c\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n<h2 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