{"id":177539,"date":"2024-11-08T14:59:23","date_gmt":"2024-11-08T06:59:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/177539\/"},"modified":"2024-11-08T14:59:23","modified_gmt":"2024-11-08T06:59:23","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41140-sqlstate-42000%ef%bc%88er_mix_of_group_func_and_fields%ef%bc%89%e4%b8%8d%e5%b8%b6group-by%e5%ad%90%e5%8f%a5%e6%99%82%ef%bc%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/177539\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41140 &#8211; SQLSTATE: 42000\uff08ER_MIX_OF_GROUP_FUNC_AND_FIELDS\uff09\u4e0d\u5e36GROUP BY\u5b50\u53e5\u6642\uff0c\u4f7f\u7528GROUP\u5217\uff08MIN()\uff0cMAX()\uff0cCOUNT()\uff0c&#8230;\uff09\u7684\u6df7\u5408\u662f\u975e\u6cd5\u7684"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9mysql%e9%8c%af%e8%aa%a41140-sqlstate-42000%ef%bc%88er_mix_of_group_func_and_fields%ef%bc%89-cHuarvGYYW\">\u5982\u4f55\u4fee\u5fa9MySQL\u932f\u8aa41140 &#8211; SQLSTATE: 42000\uff08ER_MIX_OF_GROUP_FUNC_AND_FIELDS\uff09<\/h1>\n<p>\u5728\u4f7f\u7528MySQL\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc1140\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4f7f\u7528\u805a\u5408\u51fd\u6578\uff08\u5982MIN()\u3001MAX()\u3001COUNT()\u7b49\uff09\u6642\uff0c\u537b\u672a\u6b63\u78ba\u4f7f\u7528GROUP BY\u5b50\u53e5\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0-cHuarvGYYW\">\u932f\u8aa4\u539f\u56e0<\/h2>\n<p>\u932f\u8aa41140\u7684\u5177\u9ad4\u4fe1\u606f\u70ba\u300c\u4e0d\u5e36GROUP BY\u5b50\u53e5\u6642\uff0c\u4f7f\u7528GROUP\u5217\u7684\u6df7\u5408\u662f\u975e\u6cd5\u7684\u300d\u3002\u9019\u610f\u5473\u8457\u5728\u67e5\u8a62\u4e2d\uff0c\u5982\u679c\u4f60\u540c\u6642\u4f7f\u7528\u4e86\u805a\u5408\u51fd\u6578\u548c\u975e\u805a\u5408\u5217\uff0c\u800c\u53c8\u6c92\u6709\u4f7f\u7528GROUP BY\u5b50\u53e5\u4f86\u660e\u78ba\u5206\u7d44\uff0cMySQL\u5c07\u7121\u6cd5\u78ba\u5b9a\u5982\u4f55\u8655\u7406\u9019\u4e9b\u5217\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name, COUNT(*) FROM employees;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u8a66\u5716\u8a08\u7b97\u6bcf\u500b\u54e1\u5de5\u7684\u6578\u91cf\uff0c\u4f46\u6c92\u6709\u4f7f\u7528GROUP BY\u5b50\u53e5\u4f86\u5206\u7d44\u9019\u4e9b\u6578\u64da\u3002\u9019\u5c07\u5c0e\u81f4\u932f\u8aa41140\u7684\u51fa\u73fe\u3002<\/p>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-cHuarvGYYW\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u5728\u4f7f\u7528\u805a\u5408\u51fd\u6578\u6642\uff0c\u6240\u6709\u975e\u805a\u5408\u5217\u90fd\u5fc5\u9808\u5305\u542b\u5728GROUP BY\u5b50\u53e5\u4e2d\u3002\u4ee5\u4e0b\u662f\u4fee\u6b63\u4e0a\u8ff0\u67e5\u8a62\u7684\u6b63\u78ba\u65b9\u6cd5\uff1a<\/p>\n<pre><code>SELECT name, COUNT(*) FROM employees GROUP BY name;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4fee\u6b63\u7684\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528GROUP BY\u5b50\u53e5\u4f86\u6309\u54e1\u5de5\u7684\u540d\u5b57\u9032\u884c\u5206\u7d44\uff0c\u9019\u6a23MySQL\u5c31\u80fd\u6b63\u78ba\u8a08\u7b97\u6bcf\u500b\u540d\u5b57\u7684\u51fa\u73fe\u6b21\u6578\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-cHuarvGYYW\">\u4f7f\u7528\u805a\u5408\u51fd\u6578\u7684\u6ce8\u610f\u4e8b\u9805<\/h3>\n<ul>\n<li><strong>\u78ba\u4fdd\u6240\u6709\u975e\u805a\u5408\u5217\u90fd\u5728GROUP BY\u4e2d\uff1a<\/strong>\u7576\u4f60\u4f7f\u7528\u805a\u5408\u51fd\u6578\u6642\uff0c\u6240\u6709\u672a\u88ab\u805a\u5408\u7684\u5217\u5fc5\u9808\u5728GROUP BY\u5b50\u53e5\u4e2d\u5217\u51fa\u3002<\/li>\n<li><strong>\u7406\u89e3\u805a\u5408\u51fd\u6578\u7684\u884c\u70ba\uff1a<\/strong>\u805a\u5408\u51fd\u6578\u6703\u5c0d\u5206\u7d44\u5f8c\u7684\u6578\u64da\u9032\u884c\u8a08\u7b97\uff0c\u56e0\u6b64\u5728\u8a2d\u8a08\u67e5\u8a62\u6642\u8981\u6e05\u695a\u6bcf\u500b\u51fd\u6578\u7684\u4f5c\u7528\u3002<\/li>\n<li><strong>\u6aa2\u67e5SQL\u6a21\u5f0f\uff1a<\/strong>\u67d0\u4e9bSQL\u6a21\u5f0f\uff08\u5982ONLY_FULL_GROUP_BY\uff09\u6703\u5f37\u5236\u8981\u6c42\u5728GROUP BY\u4e2d\u5305\u542b\u6240\u6709\u975e\u805a\u5408\u5217\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-cHuarvGYYW\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u66f4\u8907\u96dc\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u6b63\u78ba\u4f7f\u7528GROUP BY\u548c\u805a\u5408\u51fd\u6578\uff1a<\/p>\n<pre><code>SELECT department, AVG(salary) AS average_salary \nFROM employees \nGROUP BY department;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u8a08\u7b97\u6bcf\u500b\u90e8\u9580\u7684\u5e73\u5747\u85aa\u8cc7\uff0c\u4e26\u4e14\u6b63\u78ba\u5730\u4f7f\u7528\u4e86GROUP BY\u5b50\u53e5\u4f86\u5206\u7d44\u90e8\u9580\u3002\u9019\u6a23\u7684\u67e5\u8a62\u4e0d\u6703\u5f15\u767c\u932f\u8aa41140\uff0c\u56e0\u70ba\u6240\u6709\u975e\u805a\u5408\u5217\uff08\u5728\u9019\u88e1\u662fdepartment\uff09\u90fd\u5df2\u7d93\u5305\u542b\u5728GROUP BY\u4e2d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cHuarvGYYW\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u932f\u8aa41140\u901a\u5e38\u662f\u7531\u65bc\u5728\u67e5\u8a62\u4e2d\u6df7\u5408\u4f7f\u7528\u805a\u5408\u51fd\u6578\u548c\u975e\u805a\u5408\u5217\u800c\u672a\u6b63\u78ba\u4f7f\u7528GROUP BY\u5b50\u53e5\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u78ba\u4fdd\u6240\u6709\u975e\u805a\u5408\u5217\u90fd\u5305\u542b\u5728GROUP BY\u4e2d\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\u3002\u4e86\u89e3\u805a\u5408\u51fd\u6578\u7684\u4f7f\u7528\u548cSQL\u67e5\u8a62\u7684\u7d50\u69cb\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\uff0c\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u9084\u80fd\u907f\u514d\u5e38\u898b\u7684\u932f\u8aa4\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4fee\u5fa9MySQL\u932f\u8aa41140\u7684\u65b9\u6cd5\uff0c\u89e3\u91cb\u5982\u4f55\u6b63\u78ba\u4f7f\u7528GROUP BY\u5b50\u53e5\uff0c\u907f\u514d\u5728\u67e5\u8a62\u4e2d\u6df7\u5408\u805a\u5408\u51fd\u6578\u8207\u975e\u805a\u5408\u5b57\u6bb5\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-177539","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177539","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=177539"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177539\/revisions"}],"predecessor-version":[{"id":177540,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/177539\/revisions\/177540"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=177539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=177539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=177539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}