{"id":7890,"date":"2024-11-14T08:49:35","date_gmt":"2024-11-14T00:49:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7890\/"},"modified":"2024-11-14T08:49:35","modified_gmt":"2024-11-14T00:49:35","slug":"sql%e8%af%ad%e5%8f%a5%e4%b8%ad%ef%bc%8chaving%e5%ad%90%e5%8f%a5%e6%98%af%e5%9c%a8select%e5%ad%90%e5%8f%a5%e4%b9%8b%e5%89%8d%e6%89%a7%e8%a1%8c%e7%9a%84%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7890\/","title":{"rendered":"SQL\u8bed\u53e5\u4e2d\uff0chaving\u5b50\u53e5\u662f\u5728select\u5b50\u53e5\u4e4b\u524d\u6267\u884c\u7684\u5417\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173131651286686.jpg\" class=\"aligncenter\" title=\"SQL\u8bed\u53e5\u4e2d\uff0chaving\u5b50\u53e5\u662f\u5728select\u5b50\u53e5\u4e4b\u524d\u6267\u884c\u7684\u5417\uff1f\u63d2\u56fe\" alt=\"SQL\u8bed\u53e5\u4e2d\uff0chaving\u5b50\u53e5\u662f\u5728select\u5b50\u53e5\u4e4b\u524d\u6267\u884c\u7684\u5417\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u4e2dselect\u548chaving\u5b50\u53e5\u7684\u6267\u884c\u987a\u5e8f<\/strong><\/p>\n<p>\u5bf9\u4e8esql\u8bed\u53e5\u4e2dselect\u548chaving\u5b50\u53e5\u7684\u6267\u884c\u987a\u5e8f\uff0c\u8bf4\u6cd5\u4e0d\u4e00\u3002\u6709\u89c2\u70b9\u8ba4\u4e3a\u5148\u6267\u884cselect\uff0c\u7136\u540e\u518d\u6267\u884chaving\u3002\u7136\u800c\uff0c\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u53e6\u4e00\u79cd\u89c2\u70b9\uff0c\u5373\u5148\u6267\u884chaving\u5b50\u53e5\uff0c\u518d\u6267\u884cselect\u3002<\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6709\u4e00\u5f20\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u6570\u636e\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>id<\/th>\n<th>num<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>20<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5982\u679c\u6211\u4eec\u6267\u884c\u4ee5\u4e0bsql\u8bed\u53e5\uff1a<\/p>\n<pre>SELECT sum(num) AS all_num\nFROM table_name\nGROUP BY id\nHAVING all_num &gt; 50<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6309\u7167\u4e0a\u8ff0\u89c2\u70b9\uff0c\u6267\u884c\u987a\u5e8f\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li> <strong>\u6267\u884chaving\u5b50\u53e5\uff1a<\/strong>\u5bf9\u5206\u7ec4\u6c42\u548c\u540e\u7684\u7ed3\u679c\u8fdb\u884c\u8fc7\u6ee4\uff0c\u8fc7\u6ee4\u51fa\u603b\u548c\u5c0f\u4e8e50\u7684\u884c\uff0c\u820d\u5f03\u8fd9\u4e9b\u884c\u3002<\/li>\n<li> <strong>\u6267\u884cselect\u5b50\u53e5\uff1a<\/strong>\u4ece\u5269\u4f59\u884c\u4e2d\u9009\u62e9\u51fa\u6c42\u548c\u540e\u7684\u603b\u548c\u3002<\/li>\n<\/ol>\n<p>\u56e0\u6b64\uff0c\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cid\u4e3a1\u548c2\u7684\u884c\u5c06\u88ab\u820d\u5f03\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u603b\u548c\u5206\u522b\u4e3a20\u548c30\uff0c\u5c0f\u4e8e50\u3002\u53ea\u6709id\u4e3a3\u7684\u884c\u4fdd\u7559\uff0c\u56e0\u4e3a\u5b83\u7684\u603b\u548c\u4e3a40\uff0c\u5927\u4e8e50\u3002\u6700\u7ec8\uff0cselect\u5b50\u53e5\u8fd4\u56de\u7684\u7ed3\u679c\u4e3a[40]\u3002<\/p>\n<p>\u8fd9\u4e2a\u987a\u5e8f\u53ef\u80fd\u770b\u8d77\u6765\u6709\u4e9b\u8fdd\u53cd\u76f4\u89c9\uff0c\u56e0\u4e3a\u4f3c\u4e4eselect\u5b50\u53e5\u5e94\u8be5\u5728having\u5b50\u53e5\u4e4b\u524d\u6267\u884c\uff0c\u4ee5\u63d0\u4f9b\u8fc7\u6ee4\u6240\u9700\u7684\u8f93\u5165\u3002\u7136\u800c\uff0c\u5728sql\u4e2d\uff0chaving\u5b50\u53e5\u5b9e\u9645\u4e0a\u662f\u5728select\u5b50\u53e5\uff08\u5982\u679c\u5b58\u5728\uff09\u6267\u884c\u4e4b\u524d\u6267\u884c\u7684\u3002\u8fd9\u79cd\u6267\u884c\u987a\u5e8f\u5bf9\u4e8e\u786e\u4fddhaving\u5b50\u53e5\u53ea\u4f5c\u7528\u4e8e\u805a\u5408\u7ed3\u679c\uff08\u4f8b\u5982\uff0csum(num)\uff09\u800c\u4e0d\u662f\u539f\u59cb\u6570\u636e\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fSQL\u8bed\u53e5\u4e2d\uff0chaving\u5b50\u53e5\u662f\u5728select\u5b50\u53e5\u4e4b\u524d\u6267\u884c\u7684\u5417\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e2dselect\u548chaving\u5b50\u53e5\u7684\u6267\u884c\u987a\u5e8f \u5bf9\u4e8esql\u8bed\u53e5\u4e2dselect\u548chaving\u5b50\u53e5\u7684\u6267\u884c\u987a\u5e8f\uff0c\u8bf4\u6cd5\u4e0d\u4e00\u3002\u6709\u89c2\u70b9\u8ba4\u4e3a\u5148\u6267\u884cselect\uff0c\u7136\u540e\u518d\u6267\u884chaving\u3002\u7136\u800c\uff0c\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u53e6\u4e00\u79cd\u89c2\u70b9\uff0c\u5373\u5148\u6267\u884chaving\u5b50\u53e5\uff0c\u518d\u6267\u884cselect\u3002 \u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6709\u4e00\u5f20\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u6570\u636e\uff1a id num 1 20 2 30 3 40 \u5982\u679c\u6211\u4eec\u6267\u884c\u4ee5\u4e0bsql\u8bed\u53e5\uff1a SELECT sum(num) AS all_num FROM table_name GROUP BY id HAVING all_num &gt; 50 \u767b\u5f55\u540e\u590d\u5236 \u6309\u7167\u4e0a\u8ff0\u89c2\u70b9\uff0c\u6267\u884c\u987a\u5e8f\u5982\u4e0b\uff1a \u6267\u884chaving\u5b50\u53e5\uff1a\u5bf9\u5206\u7ec4\u6c42\u548c\u540e\u7684\u7ed3\u679c\u8fdb\u884c\u8fc7\u6ee4\uff0c\u8fc7\u6ee4\u51fa\u603b\u548c\u5c0f\u4e8e50\u7684\u884c\uff0c\u820d\u5f03\u8fd9\u4e9b\u884c\u3002 \u6267\u884cselect\u5b50\u53e5\uff1a\u4ece\u5269\u4f59\u884c\u4e2d\u9009\u62e9\u51fa\u6c42\u548c\u540e\u7684\u603b\u548c\u3002 \u56e0\u6b64\uff0c\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cid\u4e3a1\u548c2\u7684\u884c\u5c06\u88ab\u820d\u5f03\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u603b\u548c\u5206\u522b\u4e3a20\u548c30\uff0c\u5c0f\u4e8e50\u3002\u53ea\u6709id\u4e3a3\u7684\u884c\u4fdd\u7559\uff0c\u56e0\u4e3a\u5b83\u7684\u603b\u548c\u4e3a40\uff0c\u5927\u4e8e50\u3002\u6700\u7ec8\uff0cselect\u5b50\u53e5\u8fd4\u56de\u7684\u7ed3\u679c\u4e3a[40]\u3002 \u8fd9\u4e2a\u987a\u5e8f\u53ef\u80fd\u770b\u8d77\u6765\u6709\u4e9b\u8fdd\u53cd\u76f4\u89c9\uff0c\u56e0\u4e3a\u4f3c\u4e4eselect\u5b50\u53e5\u5e94\u8be5\u5728having\u5b50\u53e5\u4e4b\u524d\u6267\u884c\uff0c\u4ee5\u63d0\u4f9b\u8fc7\u6ee4\u6240\u9700\u7684\u8f93\u5165\u3002\u7136\u800c\uff0c\u5728sql\u4e2d\uff0chaving\u5b50\u53e5\u5b9e\u9645\u4e0a\u662f\u5728select\u5b50\u53e5\uff08\u5982\u679c\u5b58\u5728\uff09\u6267\u884c\u4e4b\u524d\u6267\u884c\u7684\u3002\u8fd9\u79cd\u6267\u884c\u987a\u5e8f\u5bf9\u4e8e\u786e\u4fddhaving\u5b50\u53e5\u53ea\u4f5c\u7528\u4e8e\u805a\u5408\u7ed3\u679c\uff08\u4f8b\u5982\uff0csum(num)\uff09\u800c\u4e0d\u662f\u539f\u59cb\u6570\u636e\u975e\u5e38\u91cd\u8981\u3002 \u4ee5\u4e0a\u5c31\u662fSQL\u8bed\u53e5\u4e2d\uff0chaving\u5b50\u53e5\u662f\u5728select\u5b50\u53e5\u4e4b\u524d\u6267\u884c\u7684\u5417\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7890","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=7890"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7890\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}