{"id":217766,"date":"2023-12-22T23:54:23","date_gmt":"2023-12-22T15:54:23","guid":{"rendered":"https:\/\/www.idc.net\/help\/217766\/"},"modified":"2023-12-22T23:54:23","modified_gmt":"2023-12-22T15:54:23","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e5%9c%a8%e5%88%86%e7%bb%84%e5%90%8e%e8%bf%87%e6%bb%a4%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217766\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7ec4\u540e\u8fc7\u6ee4\u884c"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e5%9c%a8%e5%88%86%e7%bb%84%e5%90%8e%e8%bf%87%e6%bb%a4%e8%a1%8c-WFNUQOzgdZ\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7ec4\u540e\u8fc7\u6ee4\u884c<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8having%e5%ad%90%e5%8f%a5%e5%9c%a8%e5%88%86%e7%bb%84%e5%90%8e%e8%bf%87%e6%bb%a4%e8%a1%8c-WFNUQOzgdZ\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7ec4\u540e\u8fc7\u6ee4\u884c<\/h1>\n<p>\u5728MySQL\u4e2d\uff0cHAVING\u5b50\u53e5\u7528\u4e8e\u5728\u5206\u7ec4\u540e\u5bf9\u7ed3\u679c\u96c6\u8fdb\u884c\u8fc7\u6ee4\u3002\u5b83\u7c7b\u4f3c\u4e8eWHERE\u5b50\u53e5\uff0c\u4f46\u662fWHERE\u5b50\u53e5\u5728\u5206\u7ec4\u4e4b\u524d\u8fdb\u884c\u8fc7\u6ee4\uff0c\u800cHAVING\u5b50\u53e5\u5728\u5206\u7ec4\u4e4b\u540e\u8fdb\u884c\u8fc7\u6ee4\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-WFNUQOzgdZ\">\u8bed\u6cd5<\/h2>\n<p>HAVING\u5b50\u53e5\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table\nWHERE condition\nGROUP BY column1, column2, ...\nHAVING condition\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u8bed\u6cd5\u4e2d\uff0cSELECT\u8bed\u53e5\u7528\u4e8e\u9009\u62e9\u8981\u8fd4\u56de\u7684\u5217\uff0cFROM\u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u8981\u67e5\u8be2\u7684\u8868\uff0cWHERE\u5b50\u53e5\u7528\u4e8e\u5728\u5206\u7ec4\u4e4b\u524d\u8fc7\u6ee4\u884c\uff0cGROUP BY\u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u5206\u7ec4\u7684\u5217\uff0cHAVING\u5b50\u53e5\u7528\u4e8e\u5728\u5206\u7ec4\u4e4b\u540e\u8fc7\u6ee4\u884c\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-WFNUQOzgdZ\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a\"orders\"\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4ee5\u4e0b\u5217\uff1aorder_id, customer_id, order_date\u548ctotal_amount\u3002\u6211\u4eec\u60f3\u8981\u627e\u5230\u6bcf\u4e2a\u5ba2\u6237\u7684\u603b\u8ba2\u5355\u91d1\u989d\u5927\u4e8e1000\u7684\u5ba2\u6237\u3002<\/p>\n<pre><code>SELECT customer_id, SUM(total_amount) as total\nFROM orders\nGROUP BY customer_id\nHAVING total &gt; 1000\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u4f7f\u7528GROUP BY\u5b50\u53e5\u6309customer_id\u5206\u7ec4\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528HAVING\u5b50\u53e5\u8fc7\u6ee4\u603b\u8ba2\u5355\u91d1\u989d\u5927\u4e8e1000\u7684\u5ba2\u6237\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9-WFNUQOzgdZ\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528HAVING\u5b50\u53e5\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>HAVING\u5b50\u53e5\u53ea\u80fd\u7528\u4e8eSELECT\u8bed\u53e5\u4e2d\u5305\u542bGROUP BY\u5b50\u53e5\u7684\u67e5\u8be2\u3002<\/li>\n<li>HAVING\u5b50\u53e5\u53ef\u4ee5\u4f7f\u7528\u805a\u5408\u51fd\u6570\uff08\u5982SUM\u3001COUNT\u3001AVG\u7b49\uff09\u3002<\/li>\n<li>HAVING\u5b50\u53e5\u4e2d\u7684\u6761\u4ef6\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u5217\u3002<\/li>\n<li>HAVING\u5b50\u53e5\u4e2d\u7684\u6761\u4ef6\u53ef\u4ee5\u4f7f\u7528AND\u548cOR\u8fd0\u7b97\u7b26\u8fdb\u884c\u7ec4\u5408\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%80%bb%e7%bb%93-WFNUQOzgdZ\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528HAVING\u5b50\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5206\u7ec4\u540e\u5bf9\u7ed3\u679c\u96c6\u8fdb\u884c\u8fc7\u6ee4\u3002\u5b83\u662f\u5728GROUP BY\u5b50\u53e5\u4e4b\u540e\u8fdb\u884c\u8fc7\u6ee4\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528\u805a\u5408\u51fd\u6570\u548c\u591a\u4e2a\u5217\u8fdb\u884c\u6761\u4ef6\u8fc7\u6ee4\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u4e00\u4e2a\u53ef\u9760\u7684\u4e91\u8ba1\u7b97\u670d\u52a1\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\uff0c\u4ee5\u6ee1\u8db3\u60a8\u7684\u4e0d\u540c\u9700\u6c42\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7ec4\u540e\u8fc7\u6ee4\u884c MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528HAVING\u5b50\u53e5\u5728\u5206\u7ec4\u540e\u8fc7\u6ee4\u884c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217766","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217766","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217766"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217766\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}