{"id":76224,"date":"2024-10-16T04:53:15","date_gmt":"2024-10-15T20:53:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76224\/"},"modified":"2024-10-16T04:53:15","modified_gmt":"2024-10-15T20:53:15","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e5%9c%a8%e5%88%86%e7%b5%84%e5%be%8c%e9%81%8e%e6%bf%be%e8%a1%8c%e3%80%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76224\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7d44\u5f8c\u904e\u6ffe\u884c\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e5%9c%a8%e5%88%86%e7%b5%84%e5%be%8c%e9%81%8e%e6%bf%be%e8%a1%8c-yrGPUEXLqP\">MySQL\u5165\u9580\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7d44\u5f8c\u904e\u6ffe\u884c<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u67e5\u8a62\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u4f7f\u7528HAVING\u5b50\u53e5\u4f86\u904e\u6ffe\u5206\u7d44\u5f8c\u7684\u7d50\u679c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eHAVING\u5b50\u53e5\u7684\u7528\u6cd5\u53ca\u5176\u5728\u6578\u64da\u67e5\u8a62\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afhaving%e5%ad%90%e5%8f%a5%ef%bc%9f-yrGPUEXLqP\">\u4ec0\u9ebc\u662fHAVING\u5b50\u53e5\uff1f<\/h2>\n<p>HAVING\u5b50\u53e5\u662fSQL\u8a9e\u8a00\u4e2d\u7684\u4e00\u90e8\u5206\uff0c\u4e3b\u8981\u7528\u65bc\u5728\u4f7f\u7528GROUP BY\u5b50\u53e5\u9032\u884c\u5206\u7d44\u5f8c\uff0c\u5c0d\u5206\u7d44\u7d50\u679c\u9032\u884c\u904e\u6ffe\u3002\u8207WHERE\u5b50\u53e5\u4e0d\u540c\uff0cWHERE\u5b50\u53e5\u662f\u5728\u6578\u64da\u5206\u7d44\u4e4b\u524d\u9032\u884c\u904e\u6ffe\uff0c\u800cHAVING\u5247\u662f\u5728\u5206\u7d44\u4e4b\u5f8c\u9032\u884c\u904e\u6ffe\u3002<\/p>\n<h2 id=\"having%e5%ad%90%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-yrGPUEXLqP\">HAVING\u5b50\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>\nSELECT column1, aggregate_function(column2)\nFROM table_name\nWHERE condition\nGROUP BY column1\nHAVING condition;\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u8a9e\u6cd5\u4e2d\uff0caggregate_function\u53ef\u4ee5\u662fSUM\u3001COUNT\u3001AVG\u7b49\u805a\u5408\u51fd\u6578\uff0ccondition\u5247\u662f\u7528\u4f86\u904e\u6ffe\u5206\u7d44\u7d50\u679c\u7684\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e7%9a%84%e5%af%a6%e9%9a%9b%e4%be%8b%e5%ad%90-yrGPUEXLqP\">\u4f7f\u7528HAVING\u5b50\u53e5\u7684\u5be6\u969b\u4f8b\u5b50<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<strong>sales<\/strong>\u7684\u8868\u683c\uff0c\u8a72\u8868\u683c\u5305\u542b\u4ee5\u4e0b\u6b04\u4f4d\uff1a<\/p>\n<ul>\n<li>id<\/li>\n<li>product<\/li>\n<li>quantity<\/li>\n<li>price<\/li>\n<\/ul>\n<p>\u6211\u5011\u5e0c\u671b\u67e5\u8a62\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u92b7\u552e\u91cf\uff0c\u4e26\u53ea\u986f\u793a\u92b7\u552e\u91cf\u8d85\u904e100\u7684\u7522\u54c1\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>\nSELECT product, SUM(quantity) AS total_quantity\nFROM sales\nGROUP BY product\nHAVING total_quantity &gt; 100;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u9996\u5148\u4f7f\u7528GROUP BY\u5c0d\u7522\u54c1\u9032\u884c\u5206\u7d44\uff0c\u7136\u5f8c\u4f7f\u7528SUM\u51fd\u6578\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u92b7\u552e\u91cf\u3002\u6700\u5f8c\uff0c\u901a\u904eHAVING\u5b50\u53e5\u904e\u6ffe\u51fa\u7e3d\u92b7\u552e\u91cf\u5927\u65bc100\u7684\u7522\u54c1\u3002<\/p>\n<h2 id=\"having%e5%ad%90%e5%8f%a5%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-yrGPUEXLqP\">HAVING\u5b50\u53e5\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528HAVING\u5b50\u53e5\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li><strong>\u805a\u5408\u51fd\u6578\uff1a<\/strong>HAVING\u5b50\u53e5\u901a\u5e38\u8207\u805a\u5408\u51fd\u6578\u4e00\u8d77\u4f7f\u7528\uff0c\u56e0\u70ba\u5b83\u662f\u7528\u4f86\u904e\u6ffe\u805a\u5408\u7d50\u679c\u7684\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u7531\u65bcHAVING\u662f\u5728\u5206\u7d44\u5f8c\u9032\u884c\u904e\u6ffe\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u61c9\u76e1\u91cf\u5728WHERE\u5b50\u53e5\u4e2d\u9032\u884c\u521d\u6b65\u904e\u6ffe\uff0c\u4ee5\u6e1b\u5c11\u9700\u8981\u8655\u7406\u7684\u6578\u64da\u91cf\u3002<\/li>\n<li><strong>\u591a\u500b\u689d\u4ef6\uff1a<\/strong>\u53ef\u4ee5\u5728HAVING\u5b50\u53e5\u4e2d\u4f7f\u7528AND\u6216OR\u4f86\u7d44\u5408\u591a\u500b\u904e\u6ffe\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-yrGPUEXLqP\">\u7d50\u8ad6<\/h2>\n<p>HAVING\u5b50\u53e5\u662fMySQL\u4e2d\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5728\u5206\u7d44\u5f8c\u5c0d\u6578\u64da\u9032\u884c\u7cbe\u78ba\u7684\u904e\u6ffe\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528HAVING\u5b50\u53e5\uff0c\u6578\u64da\u5206\u6790\u5e2b\u548c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5f9e\u6578\u64da\u4e2d\u63d0\u53d6\u6709\u50f9\u503c\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u5728\u5546\u696d\u5831\u544a\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\uff0c\u638c\u63e1HAVING\u5b50\u53e5\u7684\u7528\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\u5c07\u6703\u5c0d\u60a8\u6709\u6240\u5e6b\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528HAVING\u5b50\u53e5\uff0c\u5c0d\u5206\u7d44\u5f8c\u7684\u6578\u64da\u9032\u884c\u6709\u6548\u904e\u6ffe\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6e96\u78ba\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-76224","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76224","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=76224"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76224\/revisions"}],"predecessor-version":[{"id":76225,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76224\/revisions\/76225"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}