{"id":41420,"date":"2023-03-06T12:01:15","date_gmt":"2023-08-10T09:06:06","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95\/"},"modified":"2024-04-29T17:37:27","modified_gmt":"2024-04-29T09:37:27","slug":"postgresql%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84%e5%a4%87%e5%bf%98%e5%bd%95\/","title":{"rendered":"PostgreSQL\u7684\u5907\u5fd8\u5f55"},"content":{"rendered":"<p>\u6211\u4f1a\u6574\u7406\u4e00\u4e0b\u5173\u4e8ePosgreSQL\u6570\u636e\u5e93\u3001\u7528\u6237\u3001\u6a21\u5f0f\u548c\u8868\u7684DDL\u548c\u7528\u4e8e\u786e\u8ba4\u7684SQL\u3002<\/p>\n<h2>0.\u5229\u7528psql\u5de5\u5177\u8fdb\u884c\u64cd\u4f5c<\/h2>\n<pre class=\"post-pre\"><code><span class=\"nb\">sudo<\/span> <span class=\"nt\">-u<\/span> postgres psql\r\n<span class=\"nv\">postgres<\/span><span class=\"o\">=<\/span><span class=\"c\">#<\/span>\r\n<\/code><\/pre>\n<h2>1. \u6570\u636e\u5e93<\/h2>\n<ul class=\"post-ul\">\u4f5c\u6210\uff0f\u524a\u9664<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"k\">DATABASE<\/span> <span class=\"n\">testdb<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">DROP<\/span> <span class=\"k\">DATABASE<\/span> <span class=\"n\">IF<\/span> <span class=\"k\">EXISTS<\/span> <span class=\"n\">testdb<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u78ba\u8a8d<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">pg_database<\/span>\r\n<\/code><\/pre>\n<h2>2. \u521b\u5efa\u7528\u6237\uff08\u89d2\u8272\uff09<\/h2>\n<ul class=\"post-ul\">\u4f5c\u6210<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"k\">ROLE<\/span> <span class=\"n\">testuser<\/span> <span class=\"n\">PASSWORD<\/span> <span class=\"s1\">'secret'<\/span> <span class=\"n\">SUPERUSER<\/span> <span class=\"k\">CREATEDB<\/span> <span class=\"n\">CREATEROLE<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">alter<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">alter<\/span> <span class=\"k\">role<\/span> <span class=\"n\">testuser<\/span> <span class=\"n\">login<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">GRANT<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">GRANT<\/span> <span class=\"k\">ALL<\/span> <span class=\"k\">ON<\/span> <span class=\"k\">ALL<\/span> <span class=\"n\">TABLES<\/span> <span class=\"k\">IN<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"k\">public<\/span> <span class=\"k\">TO<\/span> <span class=\"n\">testuser<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">GRANT<\/span> <span class=\"k\">ALL<\/span> <span class=\"k\">ON<\/span> <span class=\"k\">ALL<\/span> <span class=\"n\">SEQUENCES<\/span> <span class=\"k\">IN<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"k\">public<\/span> <span class=\"k\">TO<\/span> <span class=\"n\">testuser<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">GRANT<\/span> <span class=\"k\">ALL<\/span> <span class=\"k\">ON<\/span> <span class=\"k\">ALL<\/span> <span class=\"n\">FUNCTIONS<\/span> <span class=\"k\">IN<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"k\">public<\/span> <span class=\"k\">TO<\/span> <span class=\"n\">testuser<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u78ba\u8a8d<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">pg_roles<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u524a\u9664<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">DROP<\/span> <span class=\"k\">ROLE<\/span> <span class=\"n\">testrole<\/span>\r\n<\/code><\/pre>\n<h2>3. \u521b\u5efa\u6a21\u5f0f<\/h2>\n<ul class=\"post-ul\">\u4f5c\u6210<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">CREATE<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"n\">testschema<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">DROP<\/span> <span class=\"k\">SCHEMA<\/span> <span class=\"n\">testschema<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u78ba\u8a8d<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">schemata<\/span>\r\n<\/code><\/pre>\n<h2>\u684c\u5b50<\/h2>\n<ul class=\"post-ul\">\u4f5c\u6210<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">create<\/span> <span class=\"k\">table<\/span> <span class=\"nv\">\"testschema\"<\/span><span class=\"p\">.<\/span><span class=\"n\">account<\/span> <span class=\"p\">(<\/span>\r\n  <span class=\"n\">username<\/span> <span class=\"nb\">character<\/span> <span class=\"nb\">varying<\/span><span class=\"p\">(<\/span><span class=\"mi\">64<\/span><span class=\"p\">)<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span>\r\n  <span class=\"p\">,<\/span> <span class=\"n\">password<\/span> <span class=\"nb\">character<\/span> <span class=\"nb\">varying<\/span><span class=\"p\">(<\/span><span class=\"mi\">255<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">,<\/span> <span class=\"n\">email<\/span> <span class=\"nb\">character<\/span> <span class=\"nb\">varying<\/span><span class=\"p\">(<\/span><span class=\"mi\">64<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">,<\/span> <span class=\"k\">primary<\/span> <span class=\"k\">key<\/span> <span class=\"p\">(<\/span><span class=\"n\">username<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u78ba\u8a8d<\/ul>\n<pre class=\"post-pre\"><code><span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">columns<\/span> <span class=\"n\">a<\/span>\r\n<span class=\"k\">where<\/span>\r\n<span class=\"n\">a<\/span><span class=\"p\">.<\/span><span class=\"n\">table_catalog<\/span><span class=\"o\">=<\/span><span class=\"s1\">'testdb'<\/span>\r\n<span class=\"k\">and<\/span> <span class=\"n\">a<\/span><span class=\"p\">.<\/span><span class=\"n\">table_schema<\/span><span class=\"o\">=<\/span><span class=\"s1\">'testschema'<\/span>\r\n<span class=\"k\">and<\/span> <span class=\"k\">table_name<\/span><span class=\"o\">=<\/span><span class=\"s1\">'account'<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<h2>5. \u4f7f\u7528\u4e3b\u952e\u4fe1\u606f\u83b7\u53d6\u5217\u6570\u636e\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">SELECT<\/span> \r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">data_type<\/span>\r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">ordinal_position<\/span>\r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">column_default<\/span>\r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">is_nullable<\/span>\r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">character_maximum_length<\/span> <span class=\"k\">as<\/span> <span class=\"n\">max_length<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">character_octet_length<\/span>   <span class=\"k\">as<\/span> <span class=\"n\">oct_length<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">numeric_precision<\/span>        <span class=\"k\">as<\/span> <span class=\"n\">num_precision<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">numeric_precision_radix<\/span>  <span class=\"k\">as<\/span> <span class=\"n\">num_radix<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">numeric_scale<\/span>            <span class=\"k\">as<\/span> <span class=\"n\">num_scale<\/span> \r\n <span class=\"p\">,<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">datetime_precision<\/span>       <span class=\"k\">as<\/span> <span class=\"n\">dt_precision<\/span>\r\n <span class=\"p\">,<\/span><span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"n\">ordinal_position<\/span>         <span class=\"k\">as<\/span> <span class=\"n\">pk_ordinal<\/span>\r\n<span class=\"p\">,(<\/span><span class=\"k\">case<\/span> <span class=\"k\">when<\/span> <span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"n\">ordinal_position<\/span> <span class=\"k\">is<\/span> <span class=\"k\">not<\/span> <span class=\"k\">null<\/span> <span class=\"k\">then<\/span> <span class=\"k\">true<\/span> <span class=\"k\">else<\/span> <span class=\"k\">false<\/span> <span class=\"k\">end<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">is_primary_key<\/span>\r\n<span class=\"p\">,(<\/span><span class=\"k\">case<\/span> <span class=\"k\">when<\/span> <span class=\"n\">substr<\/span><span class=\"p\">(<\/span><span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">column_default<\/span><span class=\"p\">,<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">7<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'nextval'<\/span> <span class=\"k\">then<\/span> <span class=\"k\">true<\/span> <span class=\"k\">else<\/span> <span class=\"k\">false<\/span> <span class=\"k\">end<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">is_serial<\/span>\r\n<span class=\"k\">from<\/span>  \r\n  <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">columns<\/span> <span class=\"n\">col<\/span> \r\n<span class=\"k\">LEFT<\/span> <span class=\"k\">JOIN<\/span>\r\n  <span class=\"p\">(<\/span><span class=\"k\">SELECT<\/span>\r\n        <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span>\r\n      <span class=\"p\">,<\/span> <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span>\r\n      <span class=\"p\">,<\/span> <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">table_name<\/span>\r\n      <span class=\"p\">,<\/span> <span class=\"n\">ccu<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span>\r\n      <span class=\"p\">,<\/span> <span class=\"n\">kcu<\/span><span class=\"p\">.<\/span><span class=\"n\">ordinal_position<\/span>\r\n    <span class=\"k\">FROM<\/span>\r\n      <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">table_constraints<\/span> <span class=\"n\">tc<\/span>\r\n    <span class=\"k\">INNER<\/span> <span class=\"k\">JOIN<\/span> \r\n      <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">constraint_column_usage<\/span> <span class=\"n\">ccu<\/span>\r\n    <span class=\"k\">ON<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ccu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span>\r\n    <span class=\"k\">AND<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ccu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span>\r\n    <span class=\"k\">AND<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ccu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_name<\/span>\r\n    <span class=\"k\">INNER<\/span> <span class=\"k\">JOIN<\/span> \r\n      <span class=\"n\">information_schema<\/span><span class=\"p\">.<\/span><span class=\"n\">key_column_usage<\/span> <span class=\"n\">kcu<\/span>\r\n    <span class=\"k\">ON<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span> <span class=\"o\">=<\/span> <span class=\"n\">kcu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span>\r\n    <span class=\"k\">AND<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span> <span class=\"o\">=<\/span> <span class=\"n\">kcu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span>\r\n    <span class=\"k\">AND<\/span> \r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">kcu<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_name<\/span>\r\n    <span class=\"k\">AND<\/span> \r\n      <span class=\"n\">ccu<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">kcu<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span>\r\n    <span class=\"k\">WHERE<\/span>\r\n      <span class=\"n\">tc<\/span><span class=\"p\">.<\/span><span class=\"n\">constraint_type<\/span><span class=\"o\">=<\/span><span class=\"s1\">'PRIMARY KEY'<\/span>\r\n  <span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"n\">pk<\/span>\r\n<span class=\"k\">ON<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">table_catalog<\/span><span class=\"o\">=<\/span><span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_catalog<\/span>\r\n<span class=\"k\">AND<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">table_schema<\/span><span class=\"o\">=<\/span><span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"k\">constraint_schema<\/span>\r\n<span class=\"k\">AND<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"k\">table_name<\/span><span class=\"o\">=<\/span><span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"k\">table_name<\/span>\r\n<span class=\"k\">AND<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span><span class=\"o\">=<\/span><span class=\"n\">pk<\/span><span class=\"p\">.<\/span><span class=\"k\">column_name<\/span>\r\n<span class=\"k\">WHERE<\/span> \r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">table_catalog<\/span><span class=\"o\">=<\/span><span class=\"s1\">'\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d'<\/span>\r\n<span class=\"k\">AND<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">table_schema<\/span><span class=\"o\">=<\/span><span class=\"s1\">'\u30b9\u30ad\u30fc\u30de\u540d'<\/span>\r\n<span class=\"k\">AND<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"k\">table_name<\/span><span class=\"o\">=<\/span><span class=\"s1\">'\u30c6\u30fc\u30d6\u30eb\u540d'<\/span>\r\n<span class=\"k\">ORDER<\/span> <span class=\"k\">BY<\/span>\r\n  <span class=\"n\">col<\/span><span class=\"p\">.<\/span><span class=\"n\">ordinal_position<\/span>  \r\n<\/code><\/pre>\n<h3>2020\u5e743\u670818\u65e5\u4fee\u6b63<\/h3>\n<p>\u4f7f\u7528\u4e3b\u952e\u8054\u63a5\u5c06&#8221;information_schema.table_constraints&#8221;\u8054\u63a5\uff0c\u5e76\u6dfb\u52a0\u6761\u4ef6&#8221;constraint_type=&#8217;PRIMARY KEY'&#8221;\u3002<\/p>\n<h2>6.\u5907\u4efd\/\u6062\u590d<\/h2>\n<h3>(1) \u5168\u4f53\u5907\u4efd<\/h3>\n<pre class=\"post-pre\"><code>pg_dumpall <span class=\"nt\">-f<\/span> all.sql\r\n<\/code><\/pre>\n<p>\u203b \u5982\u679c\u6307\u5b9a\u4e86\u6570\u636e\u5e93<\/p>\n<pre class=\"post-pre\"><code>pg_dump <span class=\"nt\">-Fp<\/span> testdb <span class=\"nt\">-f<\/span> testdb.sql\r\n<\/code><\/pre>\n<h3>(2) \u5168\u4f53\u6062\u590d<\/h3>\n<pre class=\"post-pre\"><code>psql <span class=\"nt\">--username<\/span><span class=\"o\">=<\/span>postgres <span class=\"nt\">-f<\/span> all.sql\r\n<\/code><\/pre>\n<h2>7. \u5f53\u524d\u8fdb\u7a0b\u7684\u6d3b\u52a8\u72b6\u6001<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">select<\/span> <span class=\"o\">*<\/span> <span class=\"k\">from<\/span> <span class=\"n\">pg_stat_activity<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4f1a\u6574\u7406\u4e00\u4e0b\u5173\u4e8ePosgreSQL\u6570\u636e\u5e93\u3001\u7528\u6237\u3001\u6a21\u5f0f\u548c\u8868\u7684DDL\u548c\u7528\u4e8e\u786e\u8ba4\u7684SQL\u3002 0.\u5229\u7528psql\u5de5\u5177\u8fdb\u884c [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41420","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>PostgreSQL\u7684\u5907\u5fd8\u5f55 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, 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