{"id":41483,"date":"2023-06-10T06:39:05","date_gmt":"2023-08-03T10:42:31","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90postgresql%e3%83%bbpsql%e3%80%91%e9%80%9f%e6%9f%a5%e8%a1%a8\/"},"modified":"2024-04-30T08:09:46","modified_gmt":"2024-04-30T00:09:46","slug":"%e3%80%90postgresql%e3%83%bbpsql%e3%80%91%e9%80%9f%e6%9f%a5%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90postgresql%e3%83%bbpsql%e3%80%91%e9%80%9f%e6%9f%a5%e8%a1%a8\/","title":{"rendered":"\u3010PostgreSQL\u30fbpsql\u3011\u901f\u67e5\u8868"},"content":{"rendered":"<h1>&#8220;B\u6811\u662f\u4ec0\u4e48\uff1f&#8221;<\/h1>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d477337434c4406ca8663\/1-0.png\" alt=\"2.png\" \/><\/div>\n<p>\u5f53\u5c1d\u8bd5\u6267\u884c&#8221;\\d prod&#8221;\u6765\u786e\u8ba4prod\u8868\u7684\u4e3b\u952e\u65f6\uff0c\u51fa\u73b0\u4e86\u8fd9\u6837\u7684\u663e\u793a\u3002<br \/>\nB-tree\u662f\u4ec0\u4e48\uff1f\uff1f<br \/>\n\u2192\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u7d22\u5f15\u7c7b\u578b\u3002\u9ed8\u8ba4\u7684\u7d22\u5f15\u7c7b\u578b\u662fB-tree\u3002<\/p>\n<blockquote><p>\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5982B\u6811\u3001\u54c8\u5e0c\u3001GiST\u3001SP-GiST\u3001GIN\u7b49\u3002<br \/>\n\uff08\u4e2d\u7565\uff09<br \/>\n\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cCREATE INDEX\u547d\u4ee4\u4f1a\u521b\u5efaB\u6811\u7d22\u5f15\uff0c\u5b83\u9002\u7528\u4e8e\u5927\u591a\u6570\u5e38\u89c1\u60c5\u51b5\u3002<br \/>\n\uff08\u5f15\u7528\uff1aPostgreSQL 9.2.4\u6587\u6863 \u7b2c11\u7ae0\u7d22\u5f15\uff09<\/p><\/blockquote>\n<h1>\u8fd4\u56de\u7684EXPLAIN\u6587\uff08\u5206\u6790SQL\u6267\u884c\u8ba1\u5212\uff09\u5185\u5bb9\u4ee3\u8868\u4e86\u4ec0\u4e48\u610f\u601d\uff1f<\/h1>\n<pre class=\"post-pre\"><code>postgers=# EXPLAIN SELECT * FROM zip WHERE newzip = '1500002';\r\n                       QUERY PLAN                       \r\n--------------------------------------------------------\r\n Seq Scan on zip  (cost=0.00..4312.62 rows=1 width=145)\r\n   Filter: (newzip = '1500002'::bpchar)\r\n(2 rows)\r\n<\/code><\/pre>\n<p>\u3010Seq Scan\u4ee5\u964d\u306e\u610f\u5473\u3011<br \/>\n\u5728\u201ccost=\u201d\u540e\u9762\u7684\u201c0.00\u201d\uff1a\u542f\u52a8\u6210\u672c\uff08\u5047\u8bbe\u8fd4\u56de\u7b2c\u4e00\u6761\u6570\u636e\u6240\u9700\u7684\u6210\u672c\uff09<br \/>\n\u5728\u201c..\u201d\u540e\u9762\u7684\u201c4312.62\u201d\uff1a\u603b\u6210\u672c\uff08\u5047\u8bbe\u5b8c\u6210\u5904\u7406\u6240\u9700\u7684\u6210\u672c\uff09<br \/>\n\u5728\u201crows=\u201d\u540e\u9762\u7684\u201c1\u201d\uff1a\u884c\u6570\uff08\u7531\u8ba1\u5212\u5668\u4f30\u8ba1\u7684\u8282\u70b9\u6267\u884c\u8fd4\u56de\u7684\u884c\u6570<br \/>\n\uff08\u203b\u4e0d\u662f\u5b9e\u9645\u83b7\u53d6\u7ed3\u679c\u7684\u884c\u6570\uff09\uff09<br \/>\n\u5728\u201cwidth=\u201d\u540e\u9762\u7684\u201c145\u201d\uff1a\u884c\u957f\u5ea6\uff08\u4e0a\u8ff0\u884c\u7684\u5e73\u5747\u957f\u5ea6\uff09<br \/>\n\u53c2\u8003\u94fe\u63a5\u5982\u4e0b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6211\u7406\u89e3\u4e86\u610f\u601d\uff0c\u4f46\u662f\u4e0d\u77e5\u9053&#8221;\u6210\u672c&#8221;\u548c&#8221;\u8282\u70b9&#8221;\u662f\u4ec0\u4e48\u610f\u601d\u3002\u6211\u67e5\u8fc7\u4ee5\u4e0b\u4fe1\u606f\uff1a<br \/>\n&#8220;\u6210\u672c&#8221;=\u64cd\u4f5c\u6240\u9700\u7684\u65f6\u95f4\u3002\u6210\u672c\u53d8\u91cf\u662f\u76f8\u5bf9\u503c\u3002<br \/>\n&#8220;\u8282\u70b9&#8221;=\u6267\u884c\u8ba1\u5212\u4e2d\u6267\u884c\u64cd\u4f5c\u7684\u5355\u4f4d\u3002<br \/>\n\u6211\u7406\u89e3\u4e86\u8fd9\u4e9b\u5b9a\u4e49\uff0c\u4f46\u662f\u4e0d\u77e5\u9053\u5177\u4f53\u6307\u7684\u662f\u4ec0\u4e48\u3002\u5728\u4ee5\u540e\u4f7f\u7528PostgreSQL\u65f6\uff0c\u9700\u8981\u9047\u5230\u5177\u4f53\u7684\u4f8b\u5b50\u6765\u5b66\u4e60\u3002<\/p>\n<p>\u3010\u8c03\u67e5\u7ed3\u679c\u3011<br \/>\n\u5728\u6587\u4ef6\u4e2d\u8bb0\u5f55\u7740\u3002<\/p>\n<blockquote><p>\u25cf\u521d\u671f\u5904\u7406\u7684\u4f30\u8ba1\u6210\u672c\uff08\u6d88\u8017\u7684\u65f6\u95f4\uff0c\u4f8b\u5982\u5728SORT\u8282\u70b9\u6267\u884c\u7684\u6392\u5e8f\u5904\u7406\u7684\u65f6\u95f4\uff0c\u76f4\u5230\u5f00\u59cb\u626b\u63cf\u8f93\u51fa\u4e3a\u6b62\uff09\u3002<br \/>\n\u25cf\u6574\u4f53\u4f30\u8ba1\u6210\u672c\uff08\u5f53\u63d0\u53d6\u6574\u884c\u7ed3\u679c\u65f6\u7684\u6210\u672c\u3002\u4f46\u5728\u4f7f\u7528LIMIT\u5b50\u53e5\u7684\u67e5\u8be2\u4e2d\uff0c\u4f1a\u5728\u8ba1\u7b97\u8f93\u5165\u8282\u70b9\u5230Limit\u8ba1\u5212\u8282\u70b9\u7684\u603b\u6210\u672c\u4e4b\u524d\u505c\u6b62\uff09\u3002<br \/>\n\u25cf\u8be5\u8ba1\u5212\u8282\u70b9\u8f93\u51fa\u7684\u884c\u6570\u4f30\u8ba1\uff08\u4ec5\u5f53\u6267\u884c\u5b8c\u6bd5\u65f6\uff09\u3002<br \/>\n\u25cf\u8be5\u8ba1\u5212\u8282\u70b9\u8f93\u51fa\u7684\u884c\u6570\u7684\uff08\u6309\u5b57\u8282\u8ba1\u7b97\u7684\uff09\u5e73\u5747\u4f30\u8ba1\u5bbd\u5ea6\u3002<br \/>\n\u6210\u672c\u662f\u7531\u89c4\u5212\u5668\u7684\u6210\u672c\u53c2\u6570\uff08\u53c2\u89c117.6.2\u8282\uff09\u6839\u636e\u4efb\u610f\u5355\u4f4d\u8fdb\u884c\u6d4b\u91cf\u7684\u3002<\/p><\/blockquote>\n<p>\u636e\u8bf4\uff0c\u6210\u672c\u53d8\u91cf\u662f\u76f8\u5bf9\u503c\u3002<\/p>\n<p>\u25cf \u4ec0\u4e48\u662f\u8282\u70b9\uff1f<\/p>\n<blockquote><p>\u5728\u6267\u884c\u8ba1\u5212\u4e2d\uff0c\u5904\u7406\u7684\u5355\u5143\u88ab\u79f0\u4e3a\u8282\u70b9\uff0c\u5e76\u5f62\u6210\u4e86\u4e00\u68f5\u6811\u7ed3\u6784\u3002\uff08\u5f15\u7528\u6765\u6e90\uff1aCasley Consulting Inc\u6280\u672f\u535a\u5ba2\uff09<\/p><\/blockquote>\n<hr \/>\n<p>&nbsp;<\/p>\n<h1>\u89e3\u8bfb\u547d\u4ee4<\/h1>\n<p>\u4f7f\u7528tar\u547d\u4ee4\u5c06\u5b58\u50a8\u5728PostgreSQL\u76f8\u5173\u6587\u4ef6\u7684\u6570\u636e\u76ee\u5f55$PGDATA\u4e0b\u7684\u5185\u5bb9\u8fdb\u884c\u5f52\u6863\u3002<\/p>\n<pre class=\"post-pre\"><code>[postgres@ localhost ~]$ pg_ctl stop -m fast \r\n\u30b5\u30fc\u30d0\u505c\u6b62\u51e6\u7406\u306e\u5b8c\u4e86\u3092\u5f85\u3063\u3066\u3044\u307e\u3059....\u5b8c\u4e86\r\n\u30b5\u30fc\u30d0\u306f\u505c\u6b62\u3057\u307e\u3057\u305f\r\n[postgres@ localhost ~]$ tar cvf backup.tar $PGDATA\r\n\uff08\u30fb\u30fb\u30fb\u8fd4\u7b54\u304c\u3064\u3065\u304f\uff09\r\n\uff08\u5f15\u7528\uff1a\u300e\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u6a19\u6e96\u6559\u79d1\u66f8 -PostgreSQL-\uff08Ver.2.0.0\uff09\u300f 9.2\u30d5\u30a1\u30a4\u30eb\u306e\u30b3\u30d4\u30fc\uff09\r\n<\/code><\/pre>\n<p>\u2192\u8bf7\u53c2\u9605\u4ee5\u4e0b\u6587\u7ae0<\/p>\n<p>&nbsp;<\/p>\n<h1>\u5728\u4e2d\u56fd\u7684\u672c\u5730\u5316\u89e3\u51b3\u65b9\u6848\u4e2d\uff0c\u5c06psql\u91cd\u65b0\u8868\u8fbe\u4e3a&#8221;PostgreSQL&#8221;\u3002<\/h1>\n<p>\u5f53\u51fa\u73b0\u300cpostgres-#\u300d\u65f6\uff0c\u5982\u4f55\u53d6\u6d88\u8f93\u5165\u3002<\/p>\n<pre class=\"post-pre\"><code>ostgres=# create table\r\npostgres-# \u00a5r\r\n\u554f\u3044\u5408\u308f\u305b\u30d0\u30c3\u30d5\u30a1\u304c\u30ea\u30bb\u30c3\u30c8\uff08\u30af\u30ea\u30a2\uff09\u3055\u308c\u307e\u3057\u305f\u3002\r\npostgres=#\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u53c2\u8003\u6587\u7ae0\u94fe\u63a5\uff1ahttps:\/\/www.dbonline.jp\/postgresql\/connect\/index4.html\u3002<\/p>\n<h2>\u7ed3\u675f<\/h2>\n<p>\u300c\u6216\u8005\u6309q\u6216\u8005\u6309Ctrl+D\u300d<\/p>\n<h2>\u5143\u6307\u4ee4\u662f\u6307\u4ee4\u884c\u547d\u4ee4<\/h2>\n<blockquote><p>\u5728PostgreSQL\u4e2d\uff0c\u6211\u4eec\u628a\u7528\u4e8e\u64cd\u4f5c\u7684\u547d\u4ee4\u79f0\u4e3a\u5143\u547d\u4ee4\u3002\u5143\u547d\u4ee4\u53ef\u5728\u767b\u5f55postgres\u540e\uff0c\u663e\u793apostgres=#\u63d0\u793a\u7b26\u7684\u60c5\u51b5\u4e0b\u8f93\u5165\u3002<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<h2>\u8be2\u95ee<\/h2>\n<p>\u8bf7\u8f93\u5165\u5728\u8fd9\u91cc\u7684\u6807\u8bb0\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u663e\u793a\u8868\u683c\u5217\u8868<\/h2>\n<p>\u4f60\u597d\uff1b<\/p>\n<h2>\u663e\u793a\u8868\u683c\u7ed3\u6784<\/h2>\n<p>\u8868\u540d;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;B\u6811\u662f\u4ec0\u4e48\uff1f&#8221; \u5f53\u5c1d\u8bd5\u6267\u884c&#8221;\\d prod&#8221;\u6765\u786e\u8ba4prod\u8868 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41483","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010PostgreSQL\u30fbpsql\u3011\u901f\u67e5\u8868 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010postgresql\u30fbpsql\u3011\u901f\u67e5\u8868\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" 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