{"id":96796,"date":"2024-10-20T12:26:18","date_gmt":"2024-10-20T04:26:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96796\/"},"modified":"2024-10-20T12:26:19","modified_gmt":"2024-10-20T04:26:19","slug":"postgresql-2f000-sql%e4%be%8b%e5%a4%96-%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\/96796\/","title":{"rendered":"PostgreSQL 2F000: SQL\u4f8b\u5916 \u62a5\u9519 \u6545\u969c\u4fee\u590d \u8fdc\u7a0b\u5904\u7406"},"content":{"rendered":"<h1 id=\"postgresql-2f000-sql%e4%be%8b%e5%a4%96%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-SGQaGPHEgY\">PostgreSQL 2F000: SQL\u4f8b\u5916\u5831\u932f\u6545\u969c\u4fee\u5fa9\u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f2F000\u3002\u9019\u500b\u932f\u8aa4\u4ee3\u78bc\u901a\u5e38\u8868\u793a\u4e00\u500bSQL\u4f8b\u5916\uff0c\u53ef\u80fd\u7531\u65bc\u591a\u7a2e\u539f\u56e0\u5f15\u8d77\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e2F000\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=\"2f000%e9%8c%af%e8%aa%a4%e7%9a%84%e5%ae%9a%e7%be%a9-SGQaGPHEgY\">2F000\u932f\u8aa4\u7684\u5b9a\u7fa9<\/h2>\n<p>PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc2F000\u8868\u793a\u201c\u7121\u6548\u7684SQL\u72c0\u614b\u201d\u3002\u9019\u901a\u5e38\u610f\u5473\u8457\u5728\u57f7\u884cSQL\u67e5\u8a62\u6642\uff0c\u7cfb\u7d71\u7121\u6cd5\u8b58\u5225\u6216\u8655\u7406\u8a72\u67e5\u8a62\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u8a9e\u6cd5\u932f\u8aa4\u3001\u7121\u6548\u7684\u6578\u64da\u985e\u578b\u6216\u4e0d\u6b63\u78ba\u7684\u67e5\u8a62\u7d50\u69cb\u7b49\u539f\u56e0\u9020\u6210\u7684\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e5%8e%9f%e5%9b%a0-SGQaGPHEgY\">\u5e38\u898b\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u8a9e\u6cd5\u932f\u8aa4\uff1a<\/strong>\u67e5\u8a62\u4e2d\u53ef\u80fd\u5b58\u5728\u62fc\u5beb\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684SQL\u8a9e\u6cd5\u3002<\/li>\n<li><strong>\u7121\u6548\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong>\u5617\u8a66\u5c07\u4e0d\u517c\u5bb9\u7684\u6578\u64da\u985e\u578b\u63d2\u5165\u5230\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<li><strong>\u7f3a\u5c11\u5fc5\u8981\u7684\u53c3\u6578\uff1a<\/strong>\u67d0\u4e9b\u67e5\u8a62\u53ef\u80fd\u9700\u8981\u7279\u5b9a\u7684\u53c3\u6578\uff0c\u5982\u679c\u7f3a\u5c11\u9019\u4e9b\u53c3\u6578\uff0c\u5247\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li><strong>\u4e0d\u6b63\u78ba\u7684\u67e5\u8a62\u7d50\u69cb\uff1a<\/strong>\u67e5\u8a62\u7684\u908f\u8f2f\u7d50\u69cb\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u5c0e\u81f4\u7121\u6cd5\u57f7\u884c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%85%e9%9a%9c%e6%8e%92%e9%99%a4%e6%ad%a5%e9%a9%9f-SGQaGPHEgY\">\u6545\u969c\u6392\u9664\u6b65\u9a5f<\/h2>\n<p>\u7576\u9047\u52302F000\u932f\u8aa4\u6642\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6545\u969c\u6392\u9664\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5sql%e8%aa%9e%e6%b3%95-SGQaGPHEgY\">1. \u6aa2\u67e5SQL\u8a9e\u6cd5<\/h3>\n<pre><code>SELECT * FROM users WHERE id = 'abc';  -- \u932f\u8aa4\u7684\u6578\u64da\u985e\u578b\n<\/code><\/pre>\n<p>\u78ba\u4fddSQL\u67e5\u8a62\u7684\u8a9e\u6cd5\u6b63\u78ba\uff0c\u4e26\u4e14\u6240\u6709\u7684\u95dc\u9375\u5b57\u548c\u6a19\u8b58\u7b26\u90fd\u6b63\u78ba\u62fc\u5beb\u3002<\/p>\n<h3 id=\"2-%e9%a9%97%e8%ad%89%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-SGQaGPHEgY\">2. \u9a57\u8b49\u6578\u64da\u985e\u578b<\/h3>\n<p>\u6aa2\u67e5\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u6578\u64da\u985e\u578b\u662f\u5426\u8207\u6578\u64da\u5eab\u4e2d\u5b9a\u7fa9\u7684\u985e\u578b\u76f8\u7b26\u3002\u4f8b\u5982\uff0c\u5982\u679cid\u5b57\u6bb5\u662f\u6574\u6578\u985e\u578b\uff0c\u5247\u61c9\u8a72\u4f7f\u7528\u6574\u6578\u503c\u9032\u884c\u67e5\u8a62\u3002<\/p>\n<pre><code>SELECT * FROM users WHERE id = 123;  -- \u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\n<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%a7%8b-SGQaGPHEgY\">3. \u6aa2\u67e5\u67e5\u8a62\u7d50\u69cb<\/h3>\n<p>\u78ba\u4fdd\u67e5\u8a62\u7684\u908f\u8f2f\u7d50\u69cb\u6b63\u78ba\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528JOIN\u3001GROUP BY\u6216ORDER BY\u7b49\u8a9e\u53e5\u6642\u3002<\/p>\n<pre><code>SELECT u.name, COUNT(o.id) FROM users u JOIN orders o ON u.id = o.user_id GROUP BY u.name;\n<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e6%97%a5%e8%aa%8c%e9%80%b2%e8%a1%8c%e8%aa%bf%e8%a9%a6-SGQaGPHEgY\">4. \u4f7f\u7528\u65e5\u8a8c\u9032\u884c\u8abf\u8a66<\/h3>\n<p>PostgreSQL\u63d0\u4f9b\u4e86\u8a73\u7d30\u7684\u65e5\u8a8c\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u8ffd\u8e64\u932f\u8aa4\u3002\u6aa2\u67e5\u65e5\u8a8c\u6587\u4ef6\u4ee5\u7372\u53d6\u66f4\u591a\u7684\u932f\u8aa4\u4fe1\u606f\uff0c\u9019\u5c07\u6709\u52a9\u65bc\u5b9a\u4f4d\u554f\u984c\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-SGQaGPHEgY\">\u9060\u7a0b\u8655\u7406<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u9032\u884c\u9060\u7a0b\u8655\u7406\u4f86\u89e3\u6c7a2F000\u932f\u8aa4\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u65b9\u5f0f\u5be6\u73fe\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528SSH\u9023\u63a5\u5230\u6578\u64da\u5eab\u4f3a\u670d\u5668\uff1a<\/strong>\u78ba\u4fdd\u60a8\u6709\u9069\u7576\u7684\u6b0a\u9650\u4f86\u8a2a\u554f\u6578\u64da\u5eab\u3002<\/li>\n<li><strong>\u4f7f\u7528pgAdmin\u6216\u5176\u4ed6\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\uff1a<\/strong>\u9019\u4e9b\u5de5\u5177\u63d0\u4f9b\u4e86\u53ef\u8996\u5316\u754c\u9762\uff0c\u53ef\u4ee5\u5e6b\u52a9\u60a8\u66f4\u8f15\u9b06\u5730\u6aa2\u67e5\u548c\u4fee\u6539\u67e5\u8a62\u3002<\/li>\n<li><strong>\u57f7\u884cSQL\u67e5\u8a62\u7684\u6e2c\u8a66\uff1a<\/strong>\u5728\u672c\u5730\u74b0\u5883\u4e2d\u6e2c\u8a66SQL\u67e5\u8a62\uff0c\u78ba\u4fdd\u5176\u6b63\u78ba\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SGQaGPHEgY\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u76842F000\u932f\u8aa4\u901a\u5e38\u662f\u7531\u65bcSQL\u8a9e\u6cd5\u932f\u8aa4\u3001\u7121\u6548\u7684\u6578\u64da\u985e\u578b\u6216\u4e0d\u6b63\u78ba\u7684\u67e5\u8a62\u7d50\u69cb\u5f15\u8d77\u7684\u3002\u901a\u904e\u4ed4\u7d30\u6aa2\u67e5\u67e5\u8a62\u3001\u9a57\u8b49\u6578\u64da\u985e\u578b\u548c\u4f7f\u7528\u65e5\u8a8c\u9032\u884c\u8abf\u8a66\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u6b64\u5916\uff0c\u9060\u7a0b\u8655\u7406\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u7121\u6cd5\u76f4\u63a5\u8a2a\u554f\u6578\u64da\u5eab\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u6545\u969c\u6392\u9664\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u5c07\u662f\u660e\u667a\u4e4b\u8209\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u51b3PostgreSQL 2F000 SQL\u5f02\u5e38\u62a5\u9519\u7684\u6545\u969c\uff0c\u63d0\u4f9b\u8fdc\u7a0b\u5904\u7406\u65b9\u6848\uff0c\u786e\u4fdd\u6570\u636e\u5e93\u7a33\u5b9a\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-96796","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96796","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=96796"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96796\/revisions"}],"predecessor-version":[{"id":96797,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96796\/revisions\/96797"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96796"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96796"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}