{"id":200240,"date":"2025-05-06T08:00:35","date_gmt":"2025-05-06T00:00:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200240\/"},"modified":"2025-05-06T08:00:35","modified_gmt":"2025-05-06T00:00:35","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:\/\/server.hk\/cnblog\/200240\/","title":{"rendered":"SQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>SQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\uff1f<\/h1>\n<p>\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241030\/173024824167217e3156dcb.jpg\" class=\"aligncenter\"><\/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\u662f\u300aSQL \u67e5\u8be2\u6dfb\u52a0 GROUP BY \u540e\u62a5\u9519\uff0c\u600e\u4e48\u529e\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>SQL \u67e5\u8be2\u6dfb\u52a0 GROUP B&#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-200240","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200240","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=200240"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200240\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}