{"id":6980,"date":"2024-11-14T10:04:01","date_gmt":"2024-11-14T02:04:01","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6980\/"},"modified":"2024-11-14T10:04:01","modified_gmt":"2024-11-14T02:04:01","slug":"sql-%e6%9f%a5%e8%af%a2%e6%b7%bb%e5%8a%a0-group-by-%e5%90%8e%e6%8a%a5%e9%94%99%ef%bc%8c%e6%80%8e%e4%b9%88%e5%8a%9e%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6980\/","title":{"rendered":"SQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173021403860769.jpg\" class=\"aligncenter\" title=\"SQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\uff1f\u63d2\u56fe\" alt=\"SQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>SQL \u67e5\u8be2\u4e2d\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519<\/strong><\/p>\n<p>\u5728\u4f7f\u7528 SQL \u67e5\u8be2\u65f6\uff0c\u5f53\u6dfb\u52a0 GROUP BY \u5b50\u53e5\u540e\u9047\u5230\u62a5\u9519\u95ee\u9898\uff0c\u53ef\u80fd\u662f\u7531\u4e8e\u4ee5\u4e0b\u539f\u56e0\uff1a<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p>\u5982\u524d\u6587\u6240\u8ff0\uff0c\u9ad8\u7248\u672c\u7684 MySQL \u9650\u5236\u4e86 GROUP BY \u5b57\u6bb5\u7684\u4f7f\u7528\u3002\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>\u5c06\u975e GROUP \u7684\u5b57\u6bb5\u503c\u6dfb\u52a0\u5230\u805a\u96c6\u51fd\u6570\u4e2d\uff08\u4f8b\u5982 SUM()\u3001COUNT()\uff09\u3002<\/li>\n<li>\u4e3a\u975e GROUP \u7684\u5b57\u6bb5\u6307\u5b9a\u522b\u540d\u3002<\/li>\n<li>\u5982\u679c\u4f60\u53ef\u4ee5\u4f7f\u7528 MySQL 5.5 \u6216\u66f4\u65e9\u7248\u672c\uff0c\u5207\u6362\u5230\u8be5\u7248\u672c\u540e\u67e5\u8be2\u5e94\u8be5\u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fSQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\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>SQL \u67e5\u8be2\u4e2d\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519 \u5728\u4f7f\u7528 SQL \u67e5\u8be2\u65f6\uff0c\u5f53\u6dfb\u52a0 GROUP BY \u5b50\u53e5\u540e\u9047\u5230\u62a5\u9519\u95ee\u9898\uff0c\u53ef\u80fd\u662f\u7531\u4e8e\u4ee5\u4e0b\u539f\u56e0\uff1a \u89e3\u51b3\u65b9\u6848\uff1a \u5982\u524d\u6587\u6240\u8ff0\uff0c\u9ad8\u7248\u672c\u7684 MySQL \u9650\u5236\u4e86 GROUP BY \u5b57\u6bb5\u7684\u4f7f\u7528\u3002\u8981\u89e3\u51b3\u6b64\u95ee\u9898\uff1a \u5c06\u975e GROUP \u7684\u5b57\u6bb5\u503c\u6dfb\u52a0\u5230\u805a\u96c6\u51fd\u6570\u4e2d\uff08\u4f8b\u5982 SUM()\u3001COUNT()\uff09\u3002 \u4e3a\u975e GROUP \u7684\u5b57\u6bb5\u6307\u5b9a\u522b\u540d\u3002 \u5982\u679c\u4f60\u53ef\u4ee5\u4f7f\u7528 MySQL 5.5 \u6216\u66f4\u65e9\u7248\u672c\uff0c\u5207\u6362\u5230\u8be5\u7248\u672c\u540e\u67e5\u8be2\u5e94\u8be5\u53ef\u4ee5\u6b63\u5e38\u8fd0\u884c\u3002 \u4ee5\u4e0a\u5c31\u662fSQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\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-6980","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6980","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=6980"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6980\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}