{"id":21400,"date":"2024-01-02T08:45:26","date_gmt":"2024-01-02T08:45:26","guid":{"rendered":"https:\/\/server.hk\/blog\/21400\/"},"modified":"2024-11-14T10:35:08","modified_gmt":"2024-11-14T02:35:08","slug":"how-to-fix-postgresql-error-code-42p20-windowing_error","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21400\/","title":{"rendered":"\u5982\u4f55\u89e3\u6c7a PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error"},"content":{"rendered":"

\u5982\u4f55\u89e3\u6c7a PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error<\/h1>\n

PostgreSQL \u662f\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7136\u800c\uff0c\u9019\u6b3e\u8edf\u4ef6\u4e5f\u5982\u540c\u5176\u4ed6\u8edf\u4ef6\u4e00\u6a23\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u932f\u8aa4\uff0c\u5f9e\u800c\u5f71\u97ff\u5176\u6b63\u5e38\u904b\u4f5c\u3002\u5176\u4e2d\u4e00\u7a2e\u932f\u8aa4\u662f PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u9019\u4e00\u932f\u8aa4\u7684\u539f\u56e0\uff0c\u4e26\u63d0\u4f9b\u9010\u6b65\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u4fee\u5fa9\u5b83\u3002<\/p>\n

\u7406\u89e3 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error<\/h2>\n

PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error \u767c\u751f\u5728\u67e5\u8a62\u4e2d\u7684\u7a97\u53e3\u51fd\u6578\u5b58\u5728\u554f\u984c\u6642\u3002\u7a97\u53e3\u51fd\u6578\u662f PostgreSQL \u7684\u4e00\u9805\u5f37\u5927\u529f\u80fd\uff0c\u5141\u8a31\u60a8\u5c0d\u8207\u7576\u524d\u884c\u76f8\u95dc\u7684\u4e00\u7d44\u884c\u9032\u884c\u8a08\u7b97\u3002\u9019\u4e9b\u51fd\u6578\u901a\u5e38\u7528\u65bc\u8a08\u7b97\u904b\u884c\u7e3d\u8a08\u3001\u6392\u5e8f\u884c\u4ee5\u53ca\u67e5\u627e\u79fb\u52d5\u5e73\u5747\u503c\u7b49\u4efb\u52d9\u3002<\/p>\n

\u7576\u9019\u500b\u932f\u8aa4\u767c\u751f\u6642\uff0c\u610f\u5473\u7740\u5728\u60a8\u7684\u67e5\u8a62\u4e2d\u7a97\u53e3\u51fd\u6578\u7684\u8a9e\u6cd5\u6216\u7528\u6cd5\u5b58\u5728\u554f\u984c\u3002\u9019\u53ef\u80fd\u7531\u65bc\u7f3a\u5931\u6216\u4e0d\u6b63\u78ba\u7684\u5206\u5340\u5b50\u53e5\u3001\u7121\u6548\u7684\u7a97\u53e3\u6846\u67b6\u8aaa\u660e\uff0c\u6216\u662f\u4e0d\u652f\u6301\u7684\u7a97\u53e3\u51fd\u6578\u7d44\u5408\u6240\u5f15\u8d77\u3002<\/p>\n

\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error<\/h2>\n

\u8981\u4fee\u5fa9 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error\uff0c\u8acb\u9075\u5faa\u4ee5\u4e0b\u6b65\u9a5f\uff1a<\/p>\n

\u6b65\u9a5f 1\uff1a\u6aa2\u67e5\u67e5\u8a62<\/h3>\n

\u9996\u5148\uff0c\u6aa2\u67e5\u89f8\u767c\u932f\u8aa4\u7684\u67e5\u8a62\u3002\u67e5\u627e\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u4efb\u4f55\u7a97\u53e3\u51fd\u6578\uff0c\u4e26\u6aa2\u67e5\u5b83\u5011\u662f\u5426\u6b63\u78ba\u66f8\u5beb\u53ca\u4f7f\u7528\u3002<\/p>\n

\u6b65\u9a5f 2\uff1a\u6aa2\u67e5\u5206\u5340\u5b50\u53e5<\/h3>\n

\u78ba\u4fdd\u7a97\u53e3\u51fd\u6578\u7684\u5206\u5340\u5b50\u53e5\u6b63\u78ba\u6307\u5b9a\u3002\u5206\u5340\u5b50\u53e5\u5b9a\u7fa9\u4e86\u8a08\u7b97\u4e2d\u5982\u4f55\u5c0d\u884c\u9032\u884c\u5206\u7d44\u3002\u5b83\u61c9\u8a72\u7528\u62ec\u865f\u62ec\u8d77\u4f86\uff0c\u4e26\u653e\u7f6e\u5728\u7a97\u53e3\u51fd\u6578\u4e4b\u5f8c\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u6709\u4e00\u500b\u8a08\u7b97\u6bcf\u500b\u90e8\u9580\u5e73\u5747\u85aa\u8cc7\u7684\u7a97\u53e3\u51fd\u6578\uff0c\u5206\u5340\u5b50\u53e5\u61c9\u6307\u660e\u4ee3\u8868\u90e8\u9580\u7684\u5217\uff1a<\/p>\n

SELECT department, salary, AVG(salary) OVER (PARTITION BY department) AS avg_salary\r\nFROM employees;<\/code><\/pre>\n
\u6b65\u9a5f 3\uff1a\u9a57\u8b49\u7a97\u53e3\u6846\u67b6\u8aaa\u660e<\/h3>\n
\u6aa2\u67e5\u7a97\u53e3\u6846\u67b6\u8aaa\u660e\uff0c\u5b83\u5b9a\u7fa9\u4e86\u8a08\u7b97\u6240\u7528\u7684\u884c\u7bc4\u570d\u3002\u5b83\u61c9\u8a72\u7528\u62ec\u865f\u62ec\u8d77\u4f86\uff0c\u4e26\u653e\u7f6e\u5728\u5206\u5340\u5b50\u53e5\u4e4b\u5f8c\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u60f3\u8a08\u7b97\u6bcf\u4e00\u5929\u7684\u92b7\u552e\u904b\u884c\u7e3d\u8a08\uff0c\u7a97\u53e3\u6846\u67b6\u8aaa\u660e\u61c9\u6307\u5b9a\u5f9e\u5206\u5340\u7684\u958b\u59cb\u5230\u7576\u524d\u884c\u7684\u7bc4\u570d\uff1a<\/p>\n
SELECT date, sales, SUM(sales) OVER (PARTITION BY date ORDER BY date ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS running_total\r\nFROM sales_data;<\/code><\/pre>\n
\u6b65\u9a5f 4\uff1a\u9a57\u8b49\u7a97\u53e3\u51fd\u6578\u7684\u7d44\u5408<\/h3>\n
\u5982\u679c\u60a8\u5728\u540c\u4e00\u67e5\u8a62\u4e2d\u4f7f\u7528\u591a\u500b\u7a97\u53e3\u51fd\u6578\uff0c\u8acb\u78ba\u4fdd\u5b83\u5011\u5f7c\u6b64\u517c\u5bb9\u3002\u6709\u4e9b\u7a97\u53e3\u51fd\u6578\u7684\u7d44\u5408\u5728 PostgreSQL \u4e2d\u53ef\u80fd\u4e0d\u88ab\u652f\u6301\u3002<\/p>\n
\u8acb\u53c3\u95b1 PostgreSQL \u6587\u6a94\uff0c\u4ee5\u7372\u53d6\u53d7\u652f\u6301\u7684\u7a97\u53e3\u51fd\u6578\u7d44\u5408\u53ca\u5176\u9650\u5236\u7684\u5217\u8868\u3002<\/p>\n
\u6b65\u9a5f 5\uff1a\u6e2c\u8a66\u67e5\u8a62<\/h3>\n
\u5728\u5c0d\u67e5\u8a62\u9032\u884c\u5fc5\u8981\u7684\u4fee\u6b63\u5f8c\uff0c\u518d\u6b21\u6e2c\u8a66\u4ee5\u78ba\u4fdd PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error \u5df2\u88ab\u4fee\u5fa9\u3002\u5982\u679c\u932f\u8aa4\u4ecd\u7136\u5b58\u5728\uff0c\u8acb\u4ed4\u7d30\u6aa2\u67e5\u67e5\u8a62\u4e2d\u662f\u5426\u6709\u5176\u4ed6\u8a9e\u6cd5\u6216\u7528\u6cd5\u554f\u984c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42P20 – windowing_error \u662f\u4e00\u500b\u5e38\u898b\u932f\u8aa4\uff0c\u7576\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u7a97\u53e3\u51fd\u6578\u5b58\u5728\u554f\u984c\u6642\u6703\u767c\u751f\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u548c\u4fee\u6b63\u7a97\u53e3\u51fd\u6578\u7684\u8a9e\u6cd5\u53ca\u7528\u6cd5\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u78ba\u4fdd PostgreSQL \u8cc7\u6599\u5eab\u7684\u9806\u5229\u904b\u884c\u3002<\/p>\n
\u82e5\u8981\u7372\u53d6\u6709\u95dc VPS \u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u89e3\u6c7a 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-21400","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21400","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=21400"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21400\/revisions"}],"predecessor-version":[{"id":24093,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21400\/revisions\/24093"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}