{"id":201013,"date":"2025-05-06T09:35:26","date_gmt":"2025-05-06T01:35:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201013\/"},"modified":"2025-05-06T09:35:26","modified_gmt":"2025-05-06T01:35:26","slug":"mysql-%e4%b8%ad-group-by-%e5%ad%90%e5%8f%a5%e7%9a%84%e5%ad%97%e6%ae%b5%e8%a6%81%e6%b1%82%ef%bc%9a%e5%9c%a8%e6%97%a9%e6%9c%9f%e7%89%88%e6%9c%ac%e5%92%8c-5-7-%e7%89%88%e6%9c%ac%e5%8f%8a%e4%b9%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201013\/","title":{"rendered":"MySQL \u4e2d GROUP BY \u5b50\u53e5\u7684\u5b57\u6bb5\u8981\u6c42\uff1a\u5728\u65e9\u671f\u7248\u672c\u548c 5.7 \u7248\u672c\u53ca\u4e4b\u540e\u7684\u5dee\u5f02\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>MySQL \u4e2d GROUP BY \u5b50\u53e5\u7684\u5b57\u6bb5\u8981\u6c42\uff1a\u5728\u65e9\u671f\u7248\u672c\u548c 5.7 \u7248\u672c\u53ca\u4e4b\u540e\u7684\u5dee\u5f02\u662f\u4ec0\u4e48\uff1f<\/h1>\n<p>\u4f60\u5728\u5b66\u4e60\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241125\/173252165667442eb8a46a6.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4e0d\u518d\u5f3a\u5236 group by \u4e2d\u5305\u542b\u6240\u6709\u9009\u53d6\u7684\u5b57\u6bb5<\/strong><\/p>\n<p>\u5728\u65e9\u671f\u7684 mysql \u7248\u672c\u4e2d\uff0c\u6240\u6709\u5728 select \u8bed\u53e5\u4e2d\u9009\u53d6\u7684\u5b57\u6bb5\u5fc5\u987b\u5728 group by \u5b50\u53e5\u4e2d\u6307\u5b9a\uff0c\u6216\u8005\u4ee5\u805a\u5408\u51fd\u6570\uff08\u5982 sum() \u6216 count()) \u7684\u5f62\u5f0f\u51fa\u73b0\u3002\u7136\u800c\uff0c\u4ece mysql 5.7 \u5f00\u59cb\uff0c\u9ed8\u8ba4\u7684 sql \u6a21\u5f0f\u5df2\u542f\u7528 only_full_group_by\uff0c\u8fd9\u4f7f\u5f97\u4e0d\u518d\u5f3a\u5236\u9075\u5faa\u8fd9\u4e2a\u89c4\u5219\u3002<\/p>\n<p>\u5f53 only_full_group_by \u4e3a\u542f\u7528\u72b6\u6001\u65f6\uff0c\u5728 select \u8bed\u53e5\u4e2d\u9009\u53d6\u4f46\u672a\u5728 group by \u5b50\u53e5\u4e2d\u6307\u5b9a\u7684\u6bcf\u4e2a\u5b57\u6bb5\u90fd\u5fc5\u987b\u4ee5\u805a\u5408\u51fd\u6570\u7684\u5f62\u5f0f\u51fa\u73b0\u3002\u5426\u5219\uff0cmysql \u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n<p><strong>\u7981\u7528 only_full_group_by<\/strong><\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u5728\u4e0d\u4f7f\u7528\u805a\u5408\u51fd\u6570\u7684\u60c5\u51b5\u4e0b\u5728 select \u8bed\u53e5\u4e2d\u6307\u5b9a\u4e0d\u5728 group by \u5b50\u53e5\u4e2d\u7684\u5b57\u6bb5\uff0c\u4f60\u53ef\u4ee5\u624b\u52a8\u7981\u7528 only_full_group_by \u9009\u9879\u3002\u4e3a\u6b64\uff0c\u8bf7\u4f7f\u7528 set sql_mode=&#8221;no_only_full_group_by&#8221; \u8bed\u53e5\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>SET SQL_MODE=\"NO_ONLY_FULL_GROUP_BY\";\n\nSELECT name, COUNT(*) AS count\nFROM users\nGROUP BY name;<\/pre>\n<p>\u7981\u7528 only_full_group_by \u540e\uff0c\u4e0d\u518d\u68c0\u67e5 select \u8bed\u53e5\u4e2d\u7684\u5b57\u6bb5\u662f\u5426\u51fa\u73b0\u5728 group by \u5b50\u53e5\u4e2d\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aMySQL \u4e2d GROUP BY \u5b50\u53e5\u7684\u5b57\u6bb5\u8981\u6c42\uff1a\u5728\u65e9\u671f\u7248\u672c\u548c 5.7 \u7248\u672c\u53ca\u4e4b\u540e\u7684\u5dee\u5f02\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\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>MySQL \u4e2d GROUP BY&#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-201013","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201013","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=201013"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201013\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}