{"id":180140,"date":"2024-11-09T07:44:21","date_gmt":"2024-11-08T23:44:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180140\/"},"modified":"2024-11-09T07:44:22","modified_gmt":"2024-11-08T23:44:22","slug":"%e4%b8%89%e7%a8%aesql%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180140\/","title":{"rendered":"\u4e09\u7a2eSQL\u7d22\u5f15"},"content":{"rendered":"<h1 id=\"%e4%b8%89%e7%a8%aesql%e7%b4%a2%e5%bc%95-qUdsnKDeyS\">\u4e09\u7a2eSQL\u7d22\u5f15<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u900f\u904e\u7d22\u5f15\uff0c\u8cc7\u6599\u5eab\u53ef\u4ee5\u66f4\u5feb\u5730\u627e\u5230\u6240\u9700\u7684\u8cc7\u6599\uff0c\u800c\u4e0d\u5fc5\u9010\u884c\u6383\u63cf\u6574\u500b\u8868\u683c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e09\u7a2e\u5e38\u898b\u7684SQL\u7d22\u5f15\u985e\u578b\uff1aB\u6a39\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u5168\u6587\u7d22\u5f15\u3002<\/p>\n<h2 id=\"b%e6%a8%b9%e7%b4%a2%e5%bc%95-qUdsnKDeyS\">B\u6a39\u7d22\u5f15<\/h2>\n<p>B\u6a39\u7d22\u5f15\u662f\u6700\u5e38\u898b\u7684\u7d22\u5f15\u985e\u578b\u4e4b\u4e00\uff0c\u7279\u5225\u662f\u5728\u95dc\u806f\u578b\u8cc7\u6599\u5eab\u4e2d\u3002\u5b83\u7684\u7d50\u69cb\u985e\u4f3c\u65bc\u4e00\u68f5\u6a39\uff0c\u5177\u6709\u591a\u500b\u5c64\u7d1a\uff0c\u4e26\u4e14\u6bcf\u500b\u7bc0\u9ede\u53ef\u4ee5\u5305\u542b\u591a\u500b\u5b50\u7bc0\u9ede\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97\u8cc7\u6599\u5eab\u80fd\u5920\u4ee5\u5c0d\u6578\u6642\u9593\u8907\u96dc\u5ea6\u9032\u884c\u67e5\u8a62\u3002<\/p>\n<h3 id=\"b%e6%a8%b9%e7%b4%a2%e5%bc%95%e7%9a%84%e7%89%b9%e9%bb%9e-qUdsnKDeyS\">B\u6a39\u7d22\u5f15\u7684\u7279\u9ede<\/h3>\n<ul>\n<li>\u652f\u63f4\u7bc4\u570d\u67e5\u8a62\uff1aB\u6a39\u7d22\u5f15\u53ef\u4ee5\u6709\u6548\u5730\u8655\u7406\u7bc4\u570d\u67e5\u8a62\uff0c\u4f8b\u5982\u67e5\u8a62\u67d0\u500b\u7bc4\u570d\u5167\u7684\u6240\u6709\u8cc7\u6599\u3002<\/li>\n<li>\u81ea\u52d5\u6392\u5e8f\uff1a\u8cc7\u6599\u5728\u63d2\u5165\u6642\u6703\u81ea\u52d5\u4fdd\u6301\u6392\u5e8f\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u6642\u80fd\u5920\u66f4\u5feb\u5730\u627e\u5230\u6240\u9700\u8cc7\u6599\u3002<\/li>\n<li>\u652f\u63f4\u591a\u5217\u7d22\u5f15\uff1a\u53ef\u4ee5\u5728\u591a\u500b\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u9019\u5c0d\u65bc\u8907\u96dc\u67e5\u8a62\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-qUdsnKDeyS\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_name ON users (last_name, first_name);<\/code><\/pre>\n<p>\u4e0a\u8ff0\u7bc4\u4f8b\u5728users\u8868\u7684last_name\u548cfirst_name\u5217\u4e0a\u5efa\u7acb\u4e86\u4e00\u500bB\u6a39\u7d22\u5f15\uff0c\u9019\u6a23\u5728\u67e5\u8a62\u6642\u53ef\u4ee5\u66f4\u5feb\u5730\u627e\u5230\u7b26\u5408\u689d\u4ef6\u7684\u8cc7\u6599\u3002<\/p>\n<h2 id=\"%e5%93%88%e5%b8%8c%e7%b4%a2%e5%bc%95-qUdsnKDeyS\">\u54c8\u5e0c\u7d22\u5f15<\/h2>\n<p>\u54c8\u5e0c\u7d22\u5f15\u4f7f\u7528\u54c8\u5e0c\u8868\u4f86\u5b58\u5132\u8cc7\u6599\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u7279\u5225\u662f\u5c0d\u65bc\u7b49\u503c\u67e5\u8a62\u3002\u54c8\u5e0c\u7d22\u5f15\u7684\u57fa\u672c\u539f\u7406\u662f\u5c07\u8cc7\u6599\u7684\u9375\u503c\u901a\u904e\u54c8\u5e0c\u51fd\u6578\u8f49\u63db\u70ba\u4e00\u500b\u54c8\u5e0c\u78bc\uff0c\u7136\u5f8c\u5728\u54c8\u5e0c\u8868\u4e2d\u67e5\u627e\u3002<\/p>\n<h3 id=\"%e5%93%88%e5%b8%8c%e7%b4%a2%e5%bc%95%e7%9a%84%e7%89%b9%e9%bb%9e-qUdsnKDeyS\">\u54c8\u5e0c\u7d22\u5f15\u7684\u7279\u9ede<\/h3>\n<ul>\n<li>\u5feb\u901f\u67e5\u8a62\uff1a\u5c0d\u65bc\u7b49\u503c\u67e5\u8a62\uff0c\u54c8\u5e0c\u7d22\u5f15\u7684\u67e5\u8a62\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u901a\u5e38\u70baO(1)\u7684\u6642\u9593\u8907\u96dc\u5ea6\u3002<\/li>\n<li>\u4e0d\u652f\u63f4\u7bc4\u570d\u67e5\u8a62\uff1a\u54c8\u5e0c\u7d22\u5f15\u4e0d\u9069\u5408\u7bc4\u570d\u67e5\u8a62\uff0c\u56e0\u70ba\u54c8\u5e0c\u51fd\u6578\u7121\u6cd5\u4fdd\u6301\u8cc7\u6599\u7684\u9806\u5e8f\u3002<\/li>\n<li>\u9069\u7528\u65bc\u7279\u5b9a\u5834\u666f\uff1a\u54c8\u5e0c\u7d22\u5f15\u9069\u5408\u7528\u65bc\u9700\u8981\u5feb\u901f\u67e5\u8a62\u7684\u5834\u666f\uff0c\u4f8b\u5982\u7528\u6236\u767b\u9304\u9a57\u8b49\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-qUdsnKDeyS\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE INDEX idx_hash ON users USING HASH (user_id);<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5728users\u8868\u7684user_id\u5217\u4e0a\u5efa\u7acb\u4e86\u4e00\u500b\u54c8\u5e0c\u7d22\u5f15\uff0c\u9019\u6a23\u5728\u67e5\u8a62\u7279\u5b9a\u7528\u6236\u6642\u53ef\u4ee5\u5feb\u901f\u627e\u5230\u8cc7\u6599\u3002<\/p>\n<h2 id=\"%e5%85%a8%e6%96%87%e7%b4%a2%e5%bc%95-qUdsnKDeyS\">\u5168\u6587\u7d22\u5f15<\/h2>\n<p>\u5168\u6587\u7d22\u5f15\u4e3b\u8981\u7528\u65bc\u8655\u7406\u5927\u91cf\u6587\u672c\u8cc7\u6599\u7684\u67e5\u8a62\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9032\u884c\u95dc\u9375\u5b57\u641c\u7d22\u7684\u60c5\u6cc1\u4e0b\u3002\u8207\u50b3\u7d71\u7684B\u6a39\u7d22\u5f15\u4e0d\u540c\uff0c\u5168\u6587\u7d22\u5f15\u6703\u5c07\u6587\u672c\u8cc7\u6599\u5206\u8a5e\uff0c\u4e26\u5efa\u7acb\u4e00\u500b\u5012\u6392\u7d22\u5f15\uff0c\u4ee5\u4fbf\u5feb\u901f\u67e5\u627e\u5305\u542b\u7279\u5b9a\u95dc\u9375\u5b57\u7684\u8cc7\u6599\u3002<\/p>\n<h3 id=\"%e5%85%a8%e6%96%87%e7%b4%a2%e5%bc%95%e7%9a%84%e7%89%b9%e9%bb%9e-qUdsnKDeyS\">\u5168\u6587\u7d22\u5f15\u7684\u7279\u9ede<\/h3>\n<ul>\n<li>\u652f\u63f4\u95dc\u9375\u5b57\u641c\u7d22\uff1a\u5168\u6587\u7d22\u5f15\u53ef\u4ee5\u5feb\u901f\u67e5\u627e\u5305\u542b\u7279\u5b9a\u95dc\u9375\u5b57\u7684\u8cc7\u6599\uff0c\u9069\u5408\u7528\u65bc\u641c\u7d22\u5f15\u64ce\u548c\u5167\u5bb9\u7ba1\u7406\u7cfb\u7d71\u3002<\/li>\n<li>\u652f\u63f4\u6a21\u7cca\u67e5\u8a62\uff1a\u53ef\u4ee5\u9032\u884c\u6a21\u7cca\u67e5\u8a62\uff0c\u4f8b\u5982\u67e5\u627e\u5305\u542b\u67d0\u500b\u8a5e\u6839\u7684\u6240\u6709\u8a5e\u3002<\/li>\n<li>\u9700\u8981\u984d\u5916\u7684\u5132\u5b58\u7a7a\u9593\uff1a\u7531\u65bc\u9700\u8981\u5132\u5b58\u5206\u8a5e\u548c\u5012\u6392\u7d22\u5f15\uff0c\u5168\u6587\u7d22\u5f15\u901a\u5e38\u9700\u8981\u66f4\u591a\u7684\u5132\u5b58\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-qUdsnKDeyS\">\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE FULLTEXT INDEX idx_fulltext ON articles (content);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5728articles\u8868\u7684content\u5217\u4e0a\u5efa\u7acb\u4e86\u4e00\u500b\u5168\u6587\u7d22\u5f15\uff0c\u9019\u6a23\u53ef\u4ee5\u5feb\u901f\u67e5\u627e\u5305\u542b\u7279\u5b9a\u95dc\u9375\u5b57\u7684\u6587\u7ae0\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qUdsnKDeyS\">\u7e3d\u7d50<\/h2>\n<p>\u7d22\u5f15\u5728\u8cc7\u6599\u5eab\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002B\u6a39\u7d22\u5f15\u9069\u5408\u7bc4\u570d\u67e5\u8a62\uff0c\u54c8\u5e0c\u7d22\u5f15\u5247\u5728\u7b49\u503c\u67e5\u8a62\u4e2d\u8868\u73fe\u512a\u7570\uff0c\u800c\u5168\u6587\u7d22\u5f15\u5247\u5c08\u6ce8\u65bc\u6587\u672c\u8cc7\u6599\u7684\u95dc\u9375\u5b57\u641c\u7d22\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u7684\u61c9\u7528\u5834\u666f\u4f86\u6c7a\u5b9a\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u4e09\u7a2eSQL\u7d22\u5f15\uff1a\u805a\u96c6\u7d22\u5f15\u3001\u975e\u805a\u96c6\u7d22\u5f15\u548c\u552f\u4e00\u7d22\u5f15\uff0c\u4e86\u89e3\u5b83\u5011\u7684\u7279\u9ede\u53ca\u5728\u6578\u64da\u5eab\u6027\u80fd\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-180140","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180140","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=180140"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180140\/revisions"}],"predecessor-version":[{"id":180141,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180140\/revisions\/180141"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}