{"id":96818,"date":"2024-10-20T12:37:18","date_gmt":"2024-10-20T04:37:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96818\/"},"modified":"2024-10-20T12:37:19","modified_gmt":"2024-10-20T04:37:19","slug":"postgresql-42611-%e7%84%a1%e6%95%88%e7%9a%84%e5%88%97%e5%ae%9a%e7%be%a9-%e6%8a%a5%e9%94%99-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%a4%8d-%e8%bf%9c%e7%a8%8b%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96818\/","title":{"rendered":"PostgreSQL 42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9 \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-42611-%e7%84%a1%e6%95%88%e7%9a%84%e5%88%97%e5%ae%9a%e7%be%a9-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-TvHJbITduU\">PostgreSQL 42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9 \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 PostgreSQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u300c42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9\u300d\u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8868\u793a\u5728 SQL \u67e5\u8a62\u4e2d\u5b58\u5728\u8a9e\u6cd5\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u5b9a\u7fa9\u5217\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u6b64\u932f\u8aa4\u7684\u539f\u56e0\u3001\u89e3\u6c7a\u65b9\u6848\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u9060\u7a0b\u8655\u7406\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-TvHJbITduU\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>PostgreSQL \u7684\u300c42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9\u300d\u932f\u8aa4\u901a\u5e38\u51fa\u73fe\u5728\u4ee5\u4e0b\u5e7e\u7a2e\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u8a9e\u6cd5\u932f\u8aa4\uff1a<\/strong>\u5728 SQL \u67e5\u8a62\u4e2d\uff0c\u5217\u7684\u5b9a\u7fa9\u53ef\u80fd\u5b58\u5728\u62fc\u5beb\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684\u8a9e\u6cd5\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u4e86\u4e0d\u652f\u6301\u7684\u6578\u64da\u985e\u578b\u6216\u7f3a\u5c11\u5fc5\u8981\u7684\u95dc\u9375\u5b57\u3002<\/li>\n<li><strong>\u5217\u540d\u885d\u7a81\uff1a<\/strong>\u5982\u679c\u5728\u540c\u4e00\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u91cd\u8907\u7684\u5217\u540d\uff0cPostgreSQL \u6703\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\uff0c\u5f9e\u800c\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4e0d\u6b63\u78ba\u7684\u8868\u7d50\u69cb\uff1a<\/strong>\u7576\u5617\u8a66\u5728\u4e0d\u5b58\u5728\u7684\u8868\u4e0a\u9032\u884c\u64cd\u4f5c\u6642\uff0c\u6216\u662f\u8868\u7684\u7d50\u69cb\u8207\u67e5\u8a62\u4e0d\u5339\u914d\uff0c\u4e5f\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-TvHJbITduU\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9\u300c42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9\u300d\u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5-sql-%e8%aa%9e%e6%b3%95-TvHJbITduU\">1. \u6aa2\u67e5 SQL \u8a9e\u6cd5<\/h3>\n<pre><code>SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<p>\u78ba\u4fdd SQL \u8a9e\u53e5\u7684\u8a9e\u6cd5\u6b63\u78ba\uff0c\u7279\u5225\u662f\u5217\u540d\u548c\u6578\u64da\u985e\u578b\u7684\u5b9a\u7fa9\u3002\u53ef\u4ee5\u4f7f\u7528 PostgreSQL \u7684\u5b98\u65b9\u6587\u6a94\u4f86\u78ba\u8a8d\u8a9e\u6cd5\u7684\u6b63\u78ba\u6027\u3002<\/p>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e5%88%97%e5%90%8d%e7%9a%84%e5%94%af%e4%b8%80%e6%80%a7-TvHJbITduU\">2. \u78ba\u8a8d\u5217\u540d\u7684\u552f\u4e00\u6027<\/h3>\n<p>\u6aa2\u67e5\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u540d\uff0c\u78ba\u4fdd\u6c92\u6709\u91cd\u8907\u7684\u5217\u540d\u3002\u5982\u679c\u6709\uff0c\u8acb\u4fee\u6539\u70ba\u552f\u4e00\u7684\u540d\u7a31\u3002<\/p>\n<h3 id=\"3-%e9%a9%97%e8%ad%89%e8%a1%a8%e7%b5%90%e6%a7%8b-TvHJbITduU\">3. \u9a57\u8b49\u8868\u7d50\u69cb<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u6aa2\u67e5\u8868\u7684\u7d50\u69cb\uff1a<\/p>\n<pre><code>SELECT column_name, data_type FROM information_schema.columns WHERE table_name = 'your_table_name';<\/code><\/pre>\n<p>\u78ba\u4fdd\u67e5\u8a62\u4e2d\u7684\u8868\u540d\u548c\u5217\u540d\u8207\u5be6\u969b\u7684\u6578\u64da\u5eab\u7d50\u69cb\u76f8\u7b26\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8-explain-%e8%aa%9e%e5%8f%a5-TvHJbITduU\">4. \u4f7f\u7528 EXPLAIN \u8a9e\u53e5<\/h3>\n<p>\u5728\u57f7\u884c\u67e5\u8a62\u4e4b\u524d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>EXPLAIN<\/code> \u8a9e\u53e5\u4f86\u6aa2\u67e5\u67e5\u8a62\u8a08\u5283\uff0c\u9019\u6709\u52a9\u65bc\u8b58\u5225\u6f5b\u5728\u7684\u554f\u984c\u3002<\/p>\n<pre><code>EXPLAIN SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e5%bb%ba%e8%ad%b0-TvHJbITduU\">\u9060\u7a0b\u8655\u7406\u5efa\u8b70<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u9700\u8981\u9032\u884c\u9060\u7a0b\u8655\u7406\u4f86\u89e3\u6c7a\u6b64\u932f\u8aa4\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9060\u7a0b\u684c\u9762\u5de5\u5177\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528\u5982 SSH \u6216 VNC \u7b49\u5de5\u5177\uff0c\u9060\u7a0b\u9023\u63a5\u5230\u6578\u64da\u5eab\u4f3a\u670d\u5668\uff0c\u9032\u884c\u76f4\u63a5\u7684\u67e5\u8a62\u548c\u8abf\u8a66\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u6a94\u6848\u6aa2\u67e5\uff1a<\/strong>\u6aa2\u67e5 PostgreSQL \u7684\u65e5\u8a8c\u6a94\u6848\uff0c\u9019\u4e9b\u65e5\u8a8c\u901a\u5e38\u6703\u63d0\u4f9b\u66f4\u8a73\u7d30\u7684\u932f\u8aa4\u4fe1\u606f\uff0c\u5e6b\u52a9\u5b9a\u4f4d\u554f\u984c\u3002<\/li>\n<li><strong>\u7248\u672c\u66f4\u65b0\uff1a<\/strong>\u78ba\u4fdd PostgreSQL \u7684\u7248\u672c\u662f\u6700\u65b0\u7684\uff0c\u56e0\u70ba\u67d0\u4e9b\u932f\u8aa4\u53ef\u80fd\u5728\u65b0\u7248\u672c\u4e2d\u5df2\u88ab\u4fee\u5fa9\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-TvHJbITduU\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL \u7684\u300c42611: \u7121\u6548\u7684\u5217\u5b9a\u7fa9\u300d\u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bc\u8a9e\u6cd5\u932f\u8aa4\u3001\u5217\u540d\u885d\u7a81\u6216\u8868\u7d50\u69cb\u4e0d\u5339\u914d\u5f15\u8d77\u7684\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5 SQL \u8a9e\u6cd5\u3001\u78ba\u8a8d\u5217\u540d\u7684\u552f\u4e00\u6027\u4ee5\u53ca\u9a57\u8b49\u8868\u7d50\u69cb\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u6b64\u5916\uff0c\u9060\u7a0b\u8655\u7406\u6642\uff0c\u4f7f\u7528\u5408\u9069\u7684\u5de5\u5177\u548c\u6aa2\u67e5\u65e5\u8a8c\u6a94\u6848\u4e5f\u80fd\u5e6b\u52a9\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u5c07\u662f\u660e\u667a\u4e4b\u8209\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL 42611\u9519\u8bef\uff1a\u65e0\u6548\u7684\u5217\u5b9a\u4e49\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u590d\u548c\u8fdc\u7a0b\u5904\u7406\u65b9\u6cd5\uff0c\u786e\u4fdd\u6570\u636e\u5e93\u6b63\u5e38\u8fd0\u884c\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-96818","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96818","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=96818"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96818\/revisions"}],"predecessor-version":[{"id":96819,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96818\/revisions\/96819"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}