{"id":21399,"date":"2024-01-02T08:44:24","date_gmt":"2024-01-02T08:44:24","guid":{"rendered":"https:\/\/server.hk\/blog\/21399\/"},"modified":"2024-11-14T10:35:09","modified_gmt":"2024-11-14T02:35:09","slug":"how-to-fix-postgresql-error-code-42803-grouping_error","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21399\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u3002\u7136\u800c\uff0c\u50cf\u4efb\u4f55\u8edf\u4ef6\u4e00\u6a23\uff0c\u5b83\u4e5f\u53ef\u80fd\u9047\u5230\u59a8\u7919\u5176\u529f\u80fd\u7684\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u6210\u56e0\uff0c\u4e26\u63d0\u4f9b\u89e3\u6c7a\u65b9\u6848\u4f86\u4fee\u5fa9\u5b83\u3002<\/p>\n

\u7406\u89e3 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error<\/h2>\n

PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error \u767c\u751f\u5728 GROUP BY \u5b50\u53e5\u548c\u67e5\u8a62\u7684 SELECT \u5b50\u53e5\u4e4b\u9593\u5b58\u5728\u4e0d\u5339\u914d\u6642\u3002\u6b64\u932f\u8aa4\u901a\u5e38\u8868\u793a\u67e5\u8a62\u5617\u8a66\u6aa2\u7d22\u672a\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u6216\u805a\u5408\u51fd\u6578\u4e2d\u7684\u5217\u3002<\/p>\n

\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n

SELECT department, SUM(salary) \r\nFROM employees \r\nGROUP BY department, hire_date;\r\n<\/code><\/pre>\n
\u5728\u6b64\u67e5\u8a62\u4e2d\uff0c”department” \u548c “hire_date” \u5217\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\uff0c\u4f46 “salary” \u5217\u4e0d\u5728\u5176\u4e2d\u3002\u9019\u5c07\u5c0e\u81f4 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error\u3002<\/p>\n
\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error<\/h2>\n
\u8981\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error\uff0c\u60a8\u9700\u8981\u78ba\u4fdd SELECT \u5b50\u53e5\u4e2d\u7684\u6240\u6709\u5217\u90fd\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\u6216\u8207\u805a\u5408\u51fd\u6578\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u80fd\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n
1. \u5c07\u6240\u6709\u5217\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\uff1a<\/h3>\n
SELECT department, hire_date, SUM(salary) \r\nFROM employees \r\nGROUP BY department, hire_date;\r\n<\/code><\/pre>\n
\u5728\u6b64\u89e3\u6c7a\u65b9\u6848\u4e2d\uff0c\u6211\u5011\u5df2\u5c07 “salary” \u5217\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\uff0c\u4ee5\u5339\u914d SELECT \u5b50\u53e5\u3002\u9019\u78ba\u4fdd\u4e86\u6240\u6709\u5217\u90fd\u88ab\u8003\u616e\u5728\u5167\uff0c\u4e26\u89e3\u6c7a\u4e86 grouping_error\u3002<\/p>\n
2. \u4f7f\u7528\u805a\u5408\u51fd\u6578\uff1a<\/h3>\n
SELECT department, MAX(hire_date), SUM(salary) \r\nFROM employees \r\nGROUP BY department;\r\n<\/code><\/pre>\n
\u5728\u6b64\u89e3\u6c7a\u65b9\u6848\u4e2d\uff0c\u6211\u5011\u5c0d “hire_date” \u5217\u4f7f\u7528\u4e86 MAX() \u51fd\u6578\u3002\u901a\u904e\u61c9\u7528\u805a\u5408\u51fd\u6578\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u4e0d\u5c07\u5176\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\u7684\u60c5\u6cc1\u4e0b\u5c07\u8a72\u5217\u5305\u542b\u5728 SELECT \u5b50\u53e5\u4e2d\u3002<\/p>\n
3. \u5f9e SELECT \u5b50\u53e5\u4e2d\u522a\u9664\u8a72\u5217\uff1a<\/h3>\n
SELECT department, hire_date \r\nFROM employees \r\nGROUP BY department, hire_date;\r\n<\/code><\/pre>\n
\u5982\u679c “salary” \u5217\u5728\u7d50\u679c\u96c6\u4e2d\u4e0d\u662f\u5fc5\u9700\u7684\uff0c\u60a8\u53ef\u4ee5\u7c21\u55ae\u5730\u5c07\u5176\u5f9e SELECT \u5b50\u53e5\u4e2d\u522a\u9664\u3002\u9019\u78ba\u4fdd\u4e86 SELECT \u5b50\u53e5\u4e2d\u7684\u6240\u6709\u5217\u90fd\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\u6216\u8207\u805a\u5408\u51fd\u6578\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error \u767c\u751f\u5728 GROUP BY \u5b50\u53e5\u548c\u67e5\u8a62\u7684 SELECT \u5b50\u53e5\u4e4b\u9593\u5b58\u5728\u4e0d\u5339\u914d\u6642\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u60a8\u9700\u8981\u78ba\u4fdd SELECT \u5b50\u53e5\u4e2d\u7684\u6240\u6709\u5217\u90fd\u5305\u542b\u5728 GROUP BY \u5b50\u53e5\u4e2d\u6216\u8207\u805a\u5408\u51fd\u6578\u4e00\u8d77\u4f7f\u7528\u3002\u901a\u904e\u9075\u5faa\u672c\u6587\u63d0\u4f9b\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42803 – grouping_error\uff0c\u4e26\u78ba\u4fdd\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u5e73\u7a69\u904b\u884c\u3002<\/p>\n
\u5982\u9700\u53ef\u9760\u4e14\u9ad8\u6548\u7684 VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u8a2a\u554f Server.HK<\/a>\u3002\u6191\u85c9\u6211\u5011\u4e00\u6d41\u7684 VPS \u8a17\u7ba1\u670d\u52d9\uff0c\u60a8\u53ef\u4ee5\u9ad4\u9a57\u9ad8\u6027\u80fd\u548c\u5b89\u5168\u7684 PostgreSQL \u6578\u64da\u5eab\u8a17\u7ba1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u4fee\u5fa9 PostgreSQL ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21399","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21399","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=21399"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21399\/revisions"}],"predecessor-version":[{"id":24094,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21399\/revisions\/24094"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}