{"id":178670,"date":"2024-11-08T19:54:19","date_gmt":"2024-11-08T11:54:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178670\/"},"modified":"2024-11-08T19:54:20","modified_gmt":"2024-11-08T11:54:20","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a20000-case_not_found%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178670\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a20000 &#8211; case_not_found\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a20000-case_not_found-tzRFlqaQMQ\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a20000 &#8211; case_not_found<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc20000\uff0c\u901a\u5e38\u986f\u793a\u70ba\u201ccase_not_found\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u689d\u4ef6\u4e0d\u5339\u914d\u6216\u6578\u64da\u5eab\u4e2d\u7f3a\u5c11\u76f8\u61c9\u7684\u689d\u76ee\u6709\u95dc\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc20000%e7%9a%84%e5%8e%9f%e5%9b%a0-tzRFlqaQMQ\">\u932f\u8aa4\u4ee3\u78bc20000\u7684\u539f\u56e0<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc20000\u901a\u5e38\u8868\u793a\u5728\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u7cfb\u7d71\u7121\u6cd5\u627e\u5230\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u3002\u9019\u53ef\u80fd\u7531\u4ee5\u4e0b\u5e7e\u500b\u539f\u56e0\u5f15\u8d77\uff1a<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u689d\u4ef6\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u689d\u4ef6\u4e0d\u6b63\u78ba\uff0c\u5247\u53ef\u80fd\u7121\u6cd5\u627e\u5230\u4efb\u4f55\u5339\u914d\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u540d\u7a31\u62fc\u5beb\u932f\u8aa4\u6216\u4f7f\u7528\u4e86\u932f\u8aa4\u7684\u6578\u64da\u985e\u578b\u3002<\/li>\n<li><strong>\u6578\u64da\u7f3a\u5931\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u4e2d\u6839\u672c\u4e0d\u5b58\u5728\u7b26\u5408\u67e5\u8a62\u689d\u4ef6\u7684\u6578\u64da\uff0c\u5247\u6703\u51fa\u73fe\u6b64\u932f\u8aa4\u3002\u9019\u53ef\u80fd\u662f\u56e0\u70ba\u6578\u64da\u5c1a\u672a\u63d2\u5165\uff0c\u6216\u8005\u6578\u64da\u5df2\u88ab\u522a\u9664\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u7d50\u69cb\u8b8a\u66f4\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u7684\u7d50\u69cb\u767c\u751f\u8b8a\u66f4\uff0c\u4f8b\u5982\u8868\u683c\u6216\u5b57\u6bb5\u88ab\u522a\u9664\u6216\u91cd\u547d\u540d\uff0c\u5247\u539f\u6709\u7684\u67e5\u8a62\u53ef\u80fd\u6703\u5931\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc20000-tzRFlqaQMQ\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc20000<\/h2>\n<p>\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc20000\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-tzRFlqaQMQ\">1. \u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<pre><code>SELECT * FROM your_table WHERE your_column = 'your_value';\n<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u7684\u6b63\u78ba\u6027\u3002\u78ba\u4fdd\u6240\u6709\u5b57\u6bb5\u540d\u7a31\u548c\u8868\u540d\u7a31\u90fd\u6b63\u78ba\u7121\u8aa4\uff0c\u4e26\u4e14\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u8207\u6578\u64da\u5eab\u4e2d\u7684\u5b9a\u7fa9\u76f8\u7b26\u3002<\/p>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e6%95%b8%e6%93%9a%e5%ad%98%e5%9c%a8-tzRFlqaQMQ\">2. \u78ba\u8a8d\u6578\u64da\u5b58\u5728<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\u662f\u5426\u5b58\u5728\uff1a<\/p>\n<pre><code>SELECT * FROM your_table;\n<\/code><\/pre>\n<p>\u5982\u679c\u67e5\u8a62\u7d50\u679c\u70ba\u7a7a\uff0c\u5247\u8868\u793a\u6578\u64da\u5eab\u4e2d\u6c92\u6709\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u3002\u60a8\u53ef\u80fd\u9700\u8981\u63d2\u5165\u76f8\u61c9\u7684\u6578\u64da\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%90%e6%a7%8b-tzRFlqaQMQ\">3. \u6aa2\u67e5\u6578\u64da\u5eab\u7d50\u69cb<\/h3>\n<p>\u5982\u679c\u60a8\u6700\u8fd1\u5c0d\u6578\u64da\u5eab\u7d50\u69cb\u9032\u884c\u4e86\u66f4\u6539\uff0c\u8acb\u6aa2\u67e5\u9019\u4e9b\u66f4\u6539\u662f\u5426\u5f71\u97ff\u4e86\u67e5\u8a62\u7684\u57f7\u884c\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u8868\u7684\u7d50\u69cb\uff1a<\/p>\n<pre><code>SELECT column_name, data_type FROM information_schema.columns WHERE table_name = 'your_table';\n<\/code><\/pre>\n<p>\u78ba\u4fdd\u6240\u6709\u9700\u8981\u7684\u5b57\u6bb5\u90fd\u5b58\u5728\uff0c\u4e26\u4e14\u540d\u7a31\u6b63\u78ba\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e4%be%8b%e5%a4%96%e8%99%95%e7%90%86-tzRFlqaQMQ\">4. \u4f7f\u7528\u4f8b\u5916\u8655\u7406<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4f8b\u5916\u8655\u7406\u4f86\u6355\u7372\u6b64\u932f\u8aa4\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528PL\/pgSQL\u8a9e\u8a00\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>DO $$\nBEGIN\n    -- \u5617\u8a66\u57f7\u884c\u67e5\u8a62\n    PERFORM * FROM your_table WHERE your_column = 'your_value';\nEXCEPTION\n    WHEN others THEN\n        RAISE NOTICE 'No matching case found.';\nEND $$;\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-tzRFlqaQMQ\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc20000 &#8211; case_not_found\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u689d\u4ef6\u4e0d\u6b63\u78ba\u3001\u6578\u64da\u7f3a\u5931\u6216\u6578\u64da\u5eab\u7d50\u69cb\u8b8a\u66f4\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u3001\u78ba\u8a8d\u6578\u64da\u5b58\u5728\u4ee5\u53ca\u6aa2\u67e5\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5982\u679c\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc20000 &#8211; case_not_found\uff0c\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u548c\u6b65\u9a5f\uff0c\u5e6b\u52a9\u60a8\u5feb\u901f\u6062\u5fa9\u6578\u64da\u5eab\u529f\u80fd\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-178670","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178670","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=178670"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178670\/revisions"}],"predecessor-version":[{"id":178671,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178670\/revisions\/178671"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}