{"id":178630,"date":"2024-11-08T19:34:20","date_gmt":"2024-11-08T11:34:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178630\/"},"modified":"2024-11-08T19:34:21","modified_gmt":"2024-11-08T11:34:21","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%9a02000-no_data%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178630\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a02000 &#8211; no_data\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%9a02000-no_data-hstYPDgzTp\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a02000 &#8211; no_data<\/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\u78bc02000\uff0c\u901a\u5e38\u986f\u793a\u70ba\u201cno_data\u201d\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u67e5\u8a62\u672a\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\uff0c\u9019\u53ef\u80fd\u662f\u7531\u65bc\u591a\u7a2e\u539f\u56e0\u9020\u6210\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5c0e\u81f4\u6b64\u932f\u8aa4\u7684\u5e38\u898b\u539f\u56e0\u53ca\u5176\u4fee\u5fa9\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc02000%e7%9a%84%e5%8e%9f%e5%9b%a0-hstYPDgzTp\">\u932f\u8aa4\u4ee3\u78bc02000\u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f60\u5728PostgreSQL\u4e2d\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u5982\u679c\u67e5\u8a62\u7684\u689d\u4ef6\u4e0d\u7b26\u5408\u4efb\u4f55\u6578\u64da\uff0c\u5247\u6703\u51fa\u73fe02000\u932f\u8aa4\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u7684\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u689d\u4ef6\u4e0d\u6b63\u78ba\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u7684\u689d\u4ef6\u904e\u65bc\u56b4\u683c\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6c92\u6709\u5339\u914d\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u4e00\u500b\u4e0d\u5b58\u5728\u7684ID\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u4e2d\u6c92\u6709\u6578\u64da\uff1a<\/strong>\u5982\u679c\u76ee\u6a19\u8868\u4e2d\u6c92\u6709\u4efb\u4f55\u6578\u64da\uff0c\u5247\u7121\u8ad6\u67e5\u8a62\u689d\u4ef6\u5982\u4f55\uff0c\u90fd\u6703\u8fd4\u56deno_data\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u7121\u6cd5\u6b63\u78ba\u57f7\u884c\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e86\u4e0d\u6b63\u78ba\u7684SQL\u8a9e\u6cd5\uff1a<\/strong>\u5982\u679cSQL\u8a9e\u6cd5\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u7121\u6cd5\u57f7\u884c\uff0c\u5f9e\u800c\u8fd4\u56deno_data\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a902000%e9%8c%af%e8%aa%a4-hstYPDgzTp\">\u5982\u4f55\u4fee\u5fa902000\u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9PostgreSQL\u768402000\u932f\u8aa4\u9700\u8981\u91dd\u5c0d\u5177\u9ad4\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6-hstYPDgzTp\">1. \u6aa2\u67e5\u67e5\u8a62\u689d\u4ef6<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u4f60\u7684\u67e5\u8a62\u689d\u4ef6\u662f\u5426\u6b63\u78ba\u3002\u78ba\u4fdd\u4f60\u67e5\u8a62\u7684\u5b57\u6bb5\u548c\u689d\u4ef6\u662f\u6b63\u78ba\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE id = 1;<\/code><\/pre>\n<p>\u5982\u679cID\u70ba1\u7684\u7528\u6236\u4e0d\u5b58\u5728\uff0c\u5247\u6703\u8fd4\u56de02000\u932f\u8aa4\u3002\u4f60\u53ef\u4ee5\u5617\u8a66\u4f7f\u7528\u5176\u4ed6ID\u6216\u653e\u5bec\u67e5\u8a62\u689d\u4ef6\u3002<\/p>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%9c%89%e6%95%b8%e6%93%9a-hstYPDgzTp\">2. \u78ba\u8a8d\u6578\u64da\u5eab\u4e2d\u6709\u6578\u64da<\/h3>\n<p>\u6aa2\u67e5\u76ee\u6a19\u8868\u4e2d\u662f\u5426\u6709\u6578\u64da\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u8868\u4e2d\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM users;<\/code><\/pre>\n<p>\u5982\u679c\u8868\u4e2d\u6c92\u6709\u6578\u64da\uff0c\u5247\u9700\u8981\u63d2\u5165\u6578\u64da\u624d\u80fd\u9032\u884c\u67e5\u8a62\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-hstYPDgzTp\">3. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n<p>\u78ba\u4fdd\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u8207\u6578\u64da\u5eab\u4e2d\u5b9a\u7fa9\u7684\u985e\u578b\u76f8\u5339\u914d\u3002\u4f8b\u5982\uff0c\u5982\u679cID\u662f\u6574\u6578\u985e\u578b\uff0c\u5247\u67e5\u8a62\u4e2d\u4e5f\u61c9\u4f7f\u7528\u6574\u6578\u985e\u578b\u3002<\/p>\n<h3 id=\"4-%e6%aa%a2%e6%9f%a5sql%e8%aa%9e%e6%b3%95-hstYPDgzTp\">4. \u6aa2\u67e5SQL\u8a9e\u6cd5<\/h3>\n<p>\u78ba\u4fdd\u4f60\u7684SQL\u8a9e\u6cd5\u6b63\u78ba\u3002\u53ef\u4ee5\u4f7f\u7528PostgreSQL\u7684\u67e5\u8a62\u5206\u6790\u5de5\u5177\u4f86\u6aa2\u67e5\u8a9e\u6cd5\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE id = '1';<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u4f60\u627e\u51fa\u8a9e\u6cd5\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-hstYPDgzTp\">\u7d50\u8ad6<\/h2>\n<p>PostgreSQL\u768402000\u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u67e5\u8a62\u672a\u8fd4\u56de\u4efb\u4f55\u7d50\u679c\u6240\u81f4\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u689d\u4ef6\u3001\u78ba\u8a8d\u6578\u64da\u5eab\u4e2d\u6709\u6578\u64da\u3001\u6aa2\u67e5\u6578\u64da\u985e\u578b\u548cSQL\u8a9e\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u7684\u6545\u969c\u6392\u9664\u6b65\u9a5f\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u4f60\u5728\u4f7f\u7528PostgreSQL\u6642\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7ba1\u7406\u548c\u66f4\u7a69\u5b9a\u7684\u6027\u80fd\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u4f60\u7684\u61c9\u7528\u63d0\u4f9b\u66f4\u597d\u7684\u652f\u6301\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc02000 &#8211; no_data\uff0c\u89e3\u6c7a\u67e5\u8a62\u7121\u7d50\u679c\u7684\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\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-178630","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178630","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=178630"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178630\/revisions"}],"predecessor-version":[{"id":178631,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178630\/revisions\/178631"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}