{"id":207539,"date":"2025-07-08T12:50:10","date_gmt":"2025-07-08T04:50:10","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207539\/"},"modified":"2025-07-08T12:50:10","modified_gmt":"2025-07-08T04:50:10","slug":"%e5%9c%a8-postgresql-%e4%b8%ad%e6%9b%b4%e6%94%b9%e5%a4%9a%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207539\/","title":{"rendered":"\u5728 postgresql \u4e2d\u66f4\u6539\u591a\u884c"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5728 postgresql \u4e2d\u66f4\u6539\u591a\u884c<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 14:18:20<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u89c9\u5f97\u5b66\u4e60Golang<\/span>\u5f88\u6709\u610f\u601d\uff1f\u6709\u610f\u601d\u5c31\u5bf9\u4e86\uff01\u4eca\u5929\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5728 postgresql \u4e2d\u66f4\u6539\u591a\u884c\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\uff0c\u82e5\u662f\u5728\u5b66\u4e60\u4e2d\u5bf9\u5176\u4e2d\u90e8\u5206\u77e5\u8bc6\u70b9\u6709\u7591\u95ee\uff0c\u6216\u8bb8\u770b\u4e86\u672c\u6587\u5c31\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u9700\u8981\u4f7f\u7528 2 \u4e2a\u6570\u7ec4\u66f4\u6539\u6570\u636e\u5e93\u4e2d\u7684\u884c\uff0c\u7b2c\u4e00\u4e2a\u5b58\u50a8\u6211\u9700\u8981\u66f4\u6539\u7684\u884c\u7684\u540d\u79f0\uff0c\u7b2c\u4e8c\u4e2a\u5b58\u50a8 val\u3002\u6211\u6dfb\u52a0\u4e86\u4ee3\u7801\uff0c\u4ee5\u4e86\u89e3\u6211\u60f3\u8981\u505a\u4ec0\u4e48\u3002\u6211\u53ef\u4ee5\u901a\u8fc7\u5411\u6570\u636e\u5e93\u53d1\u51fa 1 \u4e2a\u8bf7\u6c42\u6765\u5b8c\u6210\u6b64\u64cd\u4f5c<\/p>\n

func update_1(){\n    key := []string{\"Name1\", \"Name2\", \"Name4\"}\n    val := []string{\"1\", \"2\", \"4\"}\n    for i, _ := range key{\n        _, err := db.Exec(\"UPDATE table SET val = $1 WHERE name = $2\",val[i], key[i])\n        if err != nil {\n            errorLog.Println(err)\n            return\n        }\n    }\n}<\/pre>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u60a8\u53ef\u4ee5\u5c06\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u5230 postgres \u67e5\u8be2\u4e2d\u3002\u7136\u540e\u5c31\u662f\u7b80\u5355\u7684unnest()<\/code>\u548cupdate<\/code>\uff1a<\/p>\n
update t\n    set val = u.val\n    from unnest(:ar_names, :ar_vals) u(name, val)\n    where t.name = u.name;<\/pre>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5728 postgresql \u4e2d\u66f4\u6539\u591a\u884c\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207539","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207539","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=207539"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207539\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207539"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207539"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}