{"id":75814,"date":"2024-10-16T01:27:14","date_gmt":"2024-10-15T17:27:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75814\/"},"modified":"2024-10-16T01:27:15","modified_gmt":"2024-10-15T17:27:15","slug":"mysql-%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c%e6%a2%9d%e6%95%b8%e7%b7%a8%e8%99%9f%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75814\/","title":{"rendered":"MySQL \u67e5\u8a62\u7d50\u679c\u689d\u6578\u7de8\u865f\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"mysql-%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c%e6%a2%9d%e6%95%b8%e7%b7%a8%e8%99%9f%e7%a4%ba%e4%be%8b-isbYVzOLiO\">MySQL \u67e5\u8a62\u7d50\u679c\u689d\u6578\u7de8\u865f\u793a\u4f8b<\/h1>\n<p>\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u9032\u884c\u67e5\u8a62\u6642\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u7de8\u865f\uff0c\u4ee5\u4fbf\u65bc\u5f8c\u7e8c\u7684\u6578\u64da\u8655\u7406\u548c\u5c55\u793a\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 MySQL \u4e2d\u70ba\u67e5\u8a62\u7d50\u679c\u6dfb\u52a0\u689d\u6578\u7de8\u865f\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%a2%9d%e6%95%b8%e7%b7%a8%e8%99%9f-isbYVzOLiO\">\u70ba\u4ec0\u9ebc\u9700\u8981\u689d\u6578\u7de8\u865f<\/h2>\n<p>\u689d\u6578\u7de8\u865f\u5728\u6578\u64da\u5c55\u793a\u4e2d\u5177\u6709\u91cd\u8981\u610f\u7fa9\uff0c\u7279\u5225\u662f\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e0b\uff1a<\/p>\n<ul>\n<li>\u7528\u65bc\u986f\u793a\u67e5\u8a62\u7d50\u679c\u7684\u5e8f\u5217\uff0c\u65b9\u4fbf\u7528\u6236\u8b58\u5225\u6bcf\u4e00\u689d\u8a18\u9304\u3002<\/li>\n<li>\u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u689d\u6578\u7de8\u865f\u53ef\u4ee5\u5e6b\u52a9\u5feb\u901f\u5b9a\u4f4d\u7279\u5b9a\u6578\u64da\u3002<\/li>\n<li>\u5728\u5831\u544a\u6216\u6578\u64da\u5c0e\u51fa\u6642\uff0c\u689d\u6578\u7de8\u865f\u53ef\u4ee5\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-mysql-%e7%9a%84%e8%ae%8a%e9%87%8f%e9%80%b2%e8%a1%8c%e7%b7%a8%e8%99%9f-isbYVzOLiO\">\u4f7f\u7528 MySQL \u7684\u8b8a\u91cf\u9032\u884c\u7de8\u865f<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u7528\u6236\u81ea\u5b9a\u7fa9\u8b8a\u91cf\u4f86\u70ba\u67e5\u8a62\u7d50\u679c\u6dfb\u52a0\u7de8\u865f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u8b8a\u91cf\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\uff1a<\/p>\n<pre><code>SELECT @rownum := @rownum + 1 AS row_number, \n       name, \n       age \nFROM (SELECT @rownum := 0) r, \n     users \nORDER BY age;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u521d\u59cb\u5316\u4e00\u500b\u8b8a\u91cf @rownum\uff0c\u7136\u5f8c\u5728\u67e5\u8a62\u4e2d\u5c0d\u5176\u9032\u884c\u81ea\u589e\u64cd\u4f5c\u3002\u9019\u6a23\uff0c\u6bcf\u4e00\u689d\u8a18\u9304\u90fd\u6703\u7372\u5f97\u4e00\u500b\u552f\u4e00\u7684\u7de8\u865f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-row_number-%e5%87%bd%e6%95%b8-isbYVzOLiO\">\u4f7f\u7528 ROW_NUMBER() \u51fd\u6578<\/h2>\n<p>\u5f9e MySQL 8.0 \u7248\u672c\u958b\u59cb\uff0cMySQL \u5f15\u5165\u4e86\u7a97\u53e3\u51fd\u6578\uff0c\u9019\u4f7f\u5f97\u70ba\u67e5\u8a62\u7d50\u679c\u6dfb\u52a0\u7de8\u865f\u8b8a\u5f97\u66f4\u52a0\u7c21\u55ae\u3002\u53ef\u4ee5\u4f7f\u7528 ROW_NUMBER() \u51fd\u6578\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SELECT ROW_NUMBER() OVER (ORDER BY age) AS row_number, \n       name, \n       age \nFROM users;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0cROW_NUMBER() \u51fd\u6578\u6839\u64da\u5e74\u9f61\u9032\u884c\u6392\u5e8f\uff0c\u4e26\u70ba\u6bcf\u4e00\u689d\u8a18\u9304\u5206\u914d\u4e00\u500b\u7de8\u865f\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u7c21\u6f54\uff0c\u800c\u4e14\u6613\u65bc\u7406\u89e3\u3002<\/p>\n<h2 id=\"%e7%b5%90%e5%90%88%e5%85%b6%e4%bb%96%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6-isbYVzOLiO\">\u7d50\u5408\u5176\u4ed6\u67e5\u8a62\u689d\u4ef6<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u7d50\u5408\u5176\u4ed6\u67e5\u8a62\u689d\u4ef6\u4f86\u7be9\u9078\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u67e5\u8a62\u4e2d\u6dfb\u52a0\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT ROW_NUMBER() OVER (ORDER BY age) AS row_number, \n       name, \n       age \nFROM users \nWHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u53ea\u8fd4\u56de\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\uff0c\u4e26\u70ba\u5176\u5206\u914d\u7de8\u865f\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-isbYVzOLiO\">\u7e3d\u7d50<\/h2>\n<p>\u5728 MySQL \u4e2d\u70ba\u67e5\u8a62\u7d50\u679c\u6dfb\u52a0\u689d\u6578\u7de8\u865f\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7528\u6027\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u7528\u6236\u81ea\u5b9a\u7fa9\u8b8a\u91cf\u9084\u662f\u7a97\u53e3\u51fd\u6578\uff0c\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u6709\u6548\u5730\u5be6\u73fe\u7de8\u865f\u529f\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u7528\u6236\u4f86\u8aaa\uff0c\u9019\u4e9b\u6280\u5de7\u5c07\u5927\u5927\u7c21\u5316\u6578\u64da\u7ba1\u7406\u7684\u904e\u7a0b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u5728 MySQL \u67e5\u8a62\u7d50\u679c\u4e2d\u6dfb\u52a0\u689d\u6578\u7de8\u865f\uff0c\u63d0\u5347\u6578\u64da\u53ef\u8b80\u6027\u8207\u7ba1\u7406\u6548\u7387\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-75814","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75814","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=75814"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75814\/revisions"}],"predecessor-version":[{"id":75815,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75814\/revisions\/75815"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}