{"id":200516,"date":"2025-05-06T10:38:57","date_gmt":"2025-05-06T02:38:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200516\/"},"modified":"2025-05-06T10:38:57","modified_gmt":"2025-05-06T02:38:57","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e8%af%ad%e5%8f%a5%e5%b0%86%e5%ad%a6%e7%94%9f%e5%a7%93%e5%90%8d%e6%8c%89%e6%80%a7%e5%88%ab%e5%88%86%e7%bb%84%e5%b9%b6%e5%90%88%e5%b9%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200516\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5c06\u5b66\u751f\u59d3\u540d\u6309\u6027\u522b\u5206\u7ec4\u5e76\u5408\u5e76\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5c06\u5b66\u751f\u59d3\u540d\u6309\u6027\u522b\u5206\u7ec4\u5e76\u5408\u5e76\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241107\/1730951500672c394c8ffff.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u6309\u6027\u522b\u5206\u7ec4\u5e76\u5408\u5e76\u59d3\u540d<\/strong><\/p>\n<p>\u95ee\u9898\uff1a\u4e00\u4e2a\u73ed\u670950\u540d\u5b66\u751f\u7684\u4fe1\u606f\uff0c\u59d3\u540d\u548c\u6027\u522b\u5df2\u77e5\u3002\u9700\u8981\u6309\u6027\u522b\u5c06\u5b66\u751f\u5206\u7ec4\uff0c\u5e76\u628a\u6bcf\u7ec4\u7684\u59d3\u540d\u5408\u5e76\u3002<\/p>\n<p>\u7b54\u6848\uff1a\u4f7f\u7528 group_concat \u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u9700\u6c42\u3002<\/p>\n<pre>select gender, count(1), group_concat(name)\nfrom students\ngroup by gender;<\/pre>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre>-- \u521b\u5efa\u8868\nCREATE TABLE students (\n    name VARCHAR(100),\n    gender VARCHAR(10)\n);\n\n-- \u63d2\u5165\u6570\u636e\nINSERT INTO students VALUES('\u5c0f\u660e', '\u7537'), ('\u5c0f\u674e', '\u7537'), ('\u5c0f\u7ea2', '\u5973'), ('\u5c0f\u7eff', '\u5973');\n\n-- \u6309\u6027\u522b\u5206\u7ec4\u5e76\u5408\u5e76\u59d3\u540d\nSELECT gender, count(1), group_concat(name)\nFROM students\nGROUP BY gender;<\/pre>\n<p>\u793a\u4f8b\u7ed3\u679c\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>gender<\/th>\n<th>count<\/th>\n<th>name<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u7537<\/td>\n<td>2<\/td>\n<td>\u5c0f\u660e,\u5c0f\u674e<\/td>\n<\/tr>\n<tr>\n<td>\u5973<\/td>\n<td>2<\/td>\n<td>\u5c0f\u7ea2,\u5c0f\u7eff<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5c06\u5b66\u751f\u59d3\u540d\u6309\u6027\u522b\u5206\u7ec4\u5e76\u5408\u5e76\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5c06\u5b66\u751f\u59d3\u540d\u6309\u6027&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200516","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200516","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200516"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200516\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}