PostgreSQL \u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6027\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u88ab\u958b\u767c\u8005\u548c\u4f01\u696d\u61c9\u7528\u3002\u7136\u800c\uff0c\u50cf\u4efb\u4f55\u8edf\u4ef6\u4e00\u6a23\uff0c\u53ef\u80fd\u6703\u9047\u5230\u59a8\u7919\u5176\u529f\u80fd\u7684\u932f\u8aa4\u3002\u5176\u4e2d\u4e00\u500b\u932f\u8aa4\u70ba PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u542b\u7fa9\u53ca\u5176\u4fee\u5fa9\u65b9\u6cd5\u3002<\/p>\n
\u7576\u60a8\u9047\u5230 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column \u6642\uff0c\u9019\u610f\u5473\u8457\u60a8\u67e5\u8a62\u4e2d\u7684\u67d0\u500b\u5217\u5f15\u7528\u5b58\u5728\u6b67\u7fa9\u3002\u9019\u7a2e\u6b67\u7fa9\u767c\u751f\u5728\u60a8\u6240\u6307\u7684\u5217\u540d\u5728\u67e5\u8a62\u4e2d\u7684\u591a\u500b\u8868\u4e2d\u5b58\u5728\uff0c\u800c PostgreSQL \u7121\u6cd5\u78ba\u5b9a\u60a8\u6240\u6307\u7684\u662f\u54ea\u500b\u8868\u7684\u5217\u3002<\/p>\n
\u70ba\u4e86\u8aaa\u660e\u9019\u500b\u932f\u8aa4\uff0c\u6211\u5011\u4f86\u770b\u770b\u4ee5\u4e0b\u4f8b\u5b50\uff1a<\/p>\n
SELECT id FROM users, orders WHERE id = 1;<\/code><\/pre>\n\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u201cusers\u201d\u8868\u548c\u201corders\u201d\u8868\u90fd\u6709\u4e00\u500b\u540d\u70ba\u201cid\u201d\u7684\u5217\u3002\u7531\u65bc PostgreSQL \u7121\u6cd5\u78ba\u5b9a\u60a8\u6240\u6307\u7684\u662f\u54ea\u500b\u201cid\u201d\u5217\uff0c\u56e0\u6b64\u6703\u62cb\u51fa 42702 \u932f\u8aa4\u3002<\/p>\n
\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u60a8\u9700\u8981\u660e\u78ba\u6307\u5b9a\u5f15\u7528\u7684\u5217\u7684\u8868\u540d\u6216\u5225\u540d\u3002\u4ee5\u4e0b\u662f\u89e3\u6c7a\u6b67\u7fa9\u7684\u67e5\u8a62\u66f4\u65b0\u7248\u672c\uff1a<\/p>\n
SELECT users.id FROM users, orders WHERE users.id = 1;<\/code><\/pre>\n\u5728\u9019\u500b\u4fee\u6539\u904e\u7684\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u660e\u78ba\u6307\u5b9a\u8981\u5f9e\u201cusers\u201d\u8868\u4e2d\u7372\u53d6\u201cid\u201d\u5217\uff0c\u4e26\u5728\u5176\u524d\u9762\u52a0\u4e0a\u201cusers\u3002\u201d\u9019\u6a23\u6d88\u9664\u4e86\u6b67\u7fa9\uff0c\u4e26\u89e3\u6c7a\u4e86 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column\u3002<\/p>\n
\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u7684\u53e6\u4e00\u500b\u65b9\u6cd5\u662f\u4f7f\u7528\u8868\u5225\u540d\u3002\u8868\u5225\u540d\u70ba\u8868\u540d\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u5316\u7684\u8868\u793a\u6cd5\uff0c\u4f7f\u60a8\u7684\u67e5\u8a62\u66f4\u52a0\u7c21\u6f54\u6613\u8b80\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f8b\u5b50\uff1a<\/p>\n
SELECT u.id FROM users u, orders o WHERE u.id = 1;<\/code><\/pre>\n\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5c07\u5225\u540d\u201cu\u201d\u5206\u914d\u7d66\u201cusers\u201d\u8868\uff0c\u4e26\u4f7f\u7528\u5b83\u4f86\u5f15\u7528\u201cid\u201d\u5217\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u89e3\u6c7a\u4e86\u6b67\u7fa9\uff0c\u9084\u63d0\u9ad8\u4e86\u67e5\u8a62\u7684\u53ef\u8b80\u6027\u3002<\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cPostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column \u4e5f\u53ef\u80fd\u5728\u9023\u63a5\u591a\u500b\u8868\u6642\u51fa\u73fe\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u52a0\u5165\u689d\u4ef6\u4e2d\u7684\u5217\u5f15\u7528\u662f\u660e\u78ba\u7121\u6b67\u7fa9\u7684\u3002\u660e\u78ba\u6307\u5b9a\u6bcf\u500b\u5217\u5f15\u7528\u7684\u8868\u540d\u6216\u5225\u540d\u5c07\u5e6b\u52a9\u60a8\u907f\u514d\u6b64\u932f\u8aa4\u3002<\/p>\n
\u7e3d\u7d50\u4f86\u8aaa\uff0cPostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column \u767c\u751f\u5728\u67e5\u8a62\u4e2d\u67d0\u500b\u5217\u5f15\u7528\u5b58\u5728\u6b67\u7fa9\u7684\u60c5\u6cc1\u3002\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u660e\u78ba\u6307\u5b9a\u5f15\u7528\u7684\u5217\u7684\u8868\u540d\u6216\u5225\u540d\u3002\u6b64\u5916\uff0c\u4f7f\u7528\u8868\u5225\u540d\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u7c21\u6f54\u4e14\u6613\u65bc\u95b1\u8b80\u3002\u9075\u5faa\u9019\u4e9b\u6307\u5c0e\u539f\u5247\uff0c\u60a8\u53ef\u4ee5\u89e3\u6c7a\u6b67\u7fa9\uff0c\u78ba\u4fdd\u60a8\u7684 PostgreSQL \u6578\u64da\u5eab\u5e73\u7a69\u904b\u884c\u3002<\/p>\n
\u82e5\u60a8\u906d\u9047 PostgreSQL \u932f\u8aa4\u4ee3\u78bc\uff1a42702 – ambiguous_column\uff0c\u9019\u610f\u5473\u8457\u67e5\u8a62\u4e2d\u5b58\u5728\u6b67\u7fa9\u7684\u5217\u5f15\u7528\u3002\u70ba\u4e86\u89e3\u6c7a\u6b64\u932f\u8aa4\uff0c\u60a8\u53ef\u4ee5\u660e\u78ba\u6307\u5b9a\u5f15\u7528\u5217\u7684\u8868\u540d\u6216\u5225\u540d\u3002\u4f7f\u7528\u8868\u5225\u540d\u4e5f\u53ef\u4ee5\u5e6b\u52a9\u6d88\u9664\u6b67\u7fa9\u3002\u6709\u95dc PostgreSQL \u7684\u66f4\u591a\u4fe1\u606f\u53ca\u5982\u4f55\u512a\u5316\u60a8\u7684 VPS \u4e3b\u6a5f\u9ad4\u9a57\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-21426","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21426","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=21426"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21426\/revisions"}],"predecessor-version":[{"id":24062,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21426\/revisions\/24062"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}