{"id":201039,"date":"2025-05-06T10:16:11","date_gmt":"2025-05-06T02:16:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201039\/"},"modified":"2025-05-06T10:16:11","modified_gmt":"2025-05-06T02:16:11","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-mysql-%e5%b0%86%e5%ad%a6%e7%94%9f%e6%8c%89%e6%80%a7%e5%88%ab%e5%88%86%e7%bb%84%e5%b9%b6%e6%8f%90%e5%8f%96%e5%a7%93%e5%90%8d%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201039\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 MySQL \u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 MySQL \u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d\uff1f<\/h1>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u5982\u4f55\u4f7f\u7528 MySQL \u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d\uff1f\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241127\/1732678603674693cb1b8de.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d<\/strong><\/p>\n<p>\u5728 mysql \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 group by \u8bed\u53e5\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4\uff0c\u4f46\u5982\u679c\u9700\u8981\u5728\u5206\u7ec4\u540e\u83b7\u53d6\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f\uff0c\u5c31\u9700\u8981\u4f7f\u7528\u805a\u5408\u51fd\u6570\uff0c\u5982 group_concat\u3002<\/p>\n<p>\u8981\u5c06\u4e00\u4e2a\u73ed\u7684 50 \u540d\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d\uff0c\u53ef\u4ee5\u6309\u4ee5\u4e0b\u6b65\u9aa4\u7f16\u5199 mysql \u8bed\u53e5\uff1a<\/p>\n<pre>select gender, group_concat(name) as names\nfrom students\ngroup by gender;<\/pre>\n<p>\u793a\u4f8b\u6570\u636e\uff1a<\/p>\n<pre>create table students (\n    id int,\n    name varchar(100),\n    gender varchar(10)\n);\n\ninsert into students (id, name, gender) values\n(1, '\u5c0f\u660e', '\u7537'),\n(2, '\u5c0f\u674e', '\u7537'),\n(3, '\u5c0f\u7ea2', '\u5973'),\n(4, '\u5c0f\u7eff', '\u5973');<\/pre>\n<p>\u6267\u884c\u67e5\u8be2\u540e\uff0c\u5c06\u5f97\u5230\u4ee5\u4e0b\u7ed3\u679c\uff1a<\/p>\n<pre>+-------+-------------------+\n| gender | names             |\n+-------+-------------------+\n| \u7537     | \u5c0f\u660e,\u5c0f\u674e         |\n| \u5973     | \u5c0f\u7ea2,\u5c0f\u7eff         |\n+-------+-------------------+<\/pre>\n<p>\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u6210\u529f\u5730\u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\uff0c\u5e76\u63d0\u53d6\u4e86\u6bcf\u4e2a\u7ec4\u4e2d\u7684\u59d3\u540d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u4f7f\u7528 MySQL \u5c06\u5b66\u751f\u6309\u6027\u522b\u5206\u7ec4\u5e76\u63d0\u53d6\u59d3\u540d\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4f7f\u7528 MySQL \u5c06\u5b66\u751f\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-201039","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201039","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=201039"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201039\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}