{"id":41398,"date":"2022-12-19T12:38:14","date_gmt":"2023-06-11T23:15:16","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84crud%e6%93%8d%e4%bd%9c\/"},"modified":"2024-04-29T06:01:05","modified_gmt":"2024-04-28T22:01:05","slug":"postgresql%e7%9a%84crud%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/postgresql%e7%9a%84crud%e6%93%8d%e4%bd%9c\/","title":{"rendered":"PostgreSQL\u7684CRUD\u64cd\u4f5c"},"content":{"rendered":"

\u786e\u8ba4\u7248\u672c<\/h2>\n
$ psql --version\r\n$ psql -V\r\n<\/code><\/pre>\n
\u767b\u5f55<\/h2>\n
    \n
  • \n
      -U \u30e6\u30fc\u30b6\u540d<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        -p \u30dd\u30fc\u30c8\u756a\u53f7<\/ul>\n
        $ psql -U postgres -p 5432\r\n<\/code><\/pre>\n
        $ psql -U postgres -p 5433\r\n<\/code><\/pre>\n
        \u9000\u51fa\u767b\u5f55<\/h2>\n
        postgres=# \\q\r\n<\/code><\/pre>\n
        \u521b\u5efa\u6570\u636e\u5e93<\/h2>\n
        \u5728\u767b\u5f55\u4e4b\u524d\u521b\u5efa<\/h3>\n
        $ createdb blogapp -U postgres -p 5433\r\n<\/code><\/pre>\n
        \u767b\u5f55\u540e\u521b\u5efa<\/h3>\n
        postgres<\/span>=#<\/span> create<\/span> database<\/span> blogapp<\/span>;<\/span>\r\n<\/code><\/pre>\n
        \u5728\u7f16\u5199SQL\u8bed\u53e5\u65f6\uff0c\u6211\u4eec\u5fc5\u987b\u6ce8\u610f\u5728\u8bed\u53e5\u672b\u5c3e\u52a0\u4e0a\u5206\u53f7\uff08;\uff09\uff0c\u5426\u5219SQL\u8bed\u53e5\u65e0\u6cd5\u7ed3\u675f\u3002<\/p>\n
        \u8fde\u63a5\u5230\u5df2\u521b\u5efa\u7684\u6570\u636e\u5e93\u5e76\u767b\u5f55<\/h2>\n
        $ psql blogapp -U postgres -p 5433\r\n<\/code><\/pre>\n
        \u767b\u5f55\u540e\u5207\u6362\u6570\u636e\u5e93<\/h2>\n
        postgres=# \\c blogapp;\r\n<\/code><\/pre>\n
        \u67e5\u770b\u6570\u636e\u5e93\u5217\u8868<\/h2>\n
        \u5728\u767b\u5f55\u4e4b\u524d<\/h3>\n
        $ psql -l\r\n<\/code><\/pre>\n
        \u5982\u679c\u4e0d\u5b89\u88c5\u57285432\u53f7\u7aef\u53e3\u4e0a\uff0c\u767b\u5f55\u524d\u9700\u8981\u6267\u884c\u7684PostgreSQL\u547d\u4ee4\u9700\u8981\u6307\u5b9a\u7528\u6237\u548c\u7aef\u53e3\u4f5c\u4e3a\u9009\u9879\u3002<\/p>\n
        $ psql -l -U postgres -p 5433 \r\n<\/code><\/pre>\n
        \u767b\u5f55\u540e<\/h3>\n
        blogapp=# \\l\r\n<\/code><\/pre>\n
        \u5220\u9664\u6570\u636e\u5e93<\/h2>\n
        \u767b\u5f55\u524d\u5220\u9664<\/h3>\n
        $ dropdb blogapp -U postgres -p 5433\r\n<\/code><\/pre>\n
        \u767b\u5f55\u540e\u5220\u9664<\/h3>\n
        postgres<\/span>=#<\/span> drop<\/span> database<\/span> blogapp<\/span>;<\/span>\r\n<\/code><\/pre>\n
        \u67e5\u770b\u5e2e\u52a9<\/h2>\n
        \u767b\u5f55\u524d<\/h3>\n
        $ psql -?\r\n$ psql --help\r\n<\/code><\/pre>\n
        \u767b\u5f55\u540e<\/h3>\n
        blogapp=# help\r\nblogapp=# \\?\r\n<\/code><\/pre>\n
        \u521b\u5efa\u684c\u5b50<\/h2>\n
        blogapp<\/span>=#<\/span> create<\/span> table<\/span> posts<\/span>(<\/span>title<\/span> varchar<\/span>(<\/span>255<\/span>),<\/span> body<\/span> text<\/span>);<\/span>\r\n<\/code><\/pre>\n
        \u786e\u8ba4\u684c\u5b50<\/h2>\n
        blogapp=# \\dt\r\n<\/code><\/pre>\n
        \u786e\u8ba4\u8868\u683c\u7684\u7ed3\u6784<\/h2>\n
        blogapp=# \\d posts\r\n<\/code><\/pre>\n
        \u66f4\u6539\u8868\u683c\u7684\u540d\u79f0<\/h2>\n
        blogapp<\/span>=#<\/span> alter<\/span> table<\/span> posts<\/span> rename<\/span> to<\/span> myposts<\/span>;<\/span>\r\n<\/code><\/pre>\n
        \u5220\u9664\u8868\u683c<\/h2>\n
        blogapp<\/span>=#<\/span> drop<\/span> table<\/span> myposts<\/span>;<\/span>\r\n\r\n<\/code><\/pre>\n
        \u8bfb\u53d6\u5916\u90e8\u6587\u4ef6\u5e76\u6267\u884c<\/h2>\n
        create<\/span> table<\/span> posts<\/span>(<\/span>title<\/span> varchar<\/span>(<\/span>255<\/span>),<\/span> body<\/span> text<\/span>);<\/span>\r\n<\/code><\/pre>\n
        $ psql blogapp -U postgres -p 5433\r\n<\/code><\/pre>\n
        blogapp=# \\i commands.sql\r\n<\/code><\/pre>\n
        \u5728SQL\u6587\u4e2d\u7684\u6ce8\u91ca<\/h2>\n
        -- \u4e00\u884c\u30b3\u30e1\u30f3\u30c8<\/span>\r\n<\/code><\/pre>\n
        \/*\r\n\u8907\u6570\u884c\u30b3\u30e1\u30f3\u30c8\r\n*\/<\/span>\r\n<\/code><\/pre>\n
        \u5404\u79cd\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b<\/h2>\n
        \u6587\u6863
        \nhttp:\/\/www.postgresql.org\/docs\/9.3\/interactive\/datatype.html<\/p>\n
        \u6587\u6863
        \nhttp:\/\/www.postgresql.org\/docs\/9.3\/interactive\/datatype.html<\/p>\n
        create<\/span> table<\/span> posts<\/span>(<\/span>\r\n    title<\/span> varchar<\/span>(<\/span>255<\/span>),<\/span> -- \u53ef\u5909\u9577\u578b\u3067255\u6587\u5b57\u307e\u3067<\/span>\r\n    body<\/span> text<\/span> -- \u6587\u5b57\u6570\u5236\u9650\u306a\u3057<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
        \u6570\u5b57<\/h3>\n
        \u6574\u6570: integer (int)
        \n\u5b9e\u6570: real
        \n\u8fde\u7eed: serial<\/p>\n
        \u8bf7\u7528\u4e2d\u6587\u91cd\u65b0\u8868\u8fbe\u4ee5\u4e0b\u5185\u5bb9\uff0c\u4ec5\u9700\u63d0\u4f9b\u4e00\u79cd\u9009\u9879\uff1a<\/h3>\n
        \u6587\u5b57<\/p>\n
        char(5): \u67095\u4e2a\u56fa\u5b9a\u957f\u5ea6\u5b57\u7b26\u7684\u9650\u5236
        \nvarchar(255): \u6700\u591a\u53ef\u53d8\u957f\u5ea6\u4e3a255\u4e2a\u5b57\u7b26
        \ntext: \u6ca1\u6709\u5b57\u7b26\u9650\u5236<\/p>\n
        authenticity<\/h3>\n
        \u5e03\u5c14\u503c<\/p>\n
        \u53ef\u4ee5\u6307\u5b9a\u7684\u503c<\/h4>\n
          \n
        • \n
            TRUE<\/ul>\n<\/li>\n<\/ul>\n
             <\/p>\n
              \n
            • \n
                FALSE<\/ul>\n<\/li>\n<\/ul>\n
                 <\/p>\n
                  \n
                • \n
                    t<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      f<\/ul>\n
                      \u65e5\u671f<\/h3>\n
                      \u65e5\u671f\uff1a\u4ec5\u65e5\u671f
                      \n\u65f6\u95f4\uff1a\u4ec5\u65f6\u95f4
                      \n\u65f6\u95f4\u6233\uff1a\u5305\u542b\u65e5\u671f\u548c\u65f6\u95f4<\/p>\n
                      \u8d5b\u573a\u4e0a\u7684\u9650\u5236\uff08constraints\uff09<\/h2>\n
                      \u6587\u6863
                      \nhttp:\/\/www.postgresql.org\/docs\/9.3\/interactive\/ddl-constraints.html
                      \n\u7ffb\u8bd1\u4e3a\u4e2d\u6587\uff1a
                      \n\u6587\u4ef6
                      \nhttp:\/\/www.postgresql.org\/docs\/9.3\/interactive\/ddl-constraints.html<\/p>\n
                      create<\/span> table<\/span> posts<\/span>(<\/span>\r\n    id<\/span> serial<\/span> primary<\/span> key<\/span>,<\/span>\r\n    title<\/span> varchar<\/span>(<\/span>255<\/span>)<\/span> not<\/span> null<\/span>,<\/span>\r\n    body<\/span> text<\/span> check<\/span>(<\/span>length<\/span>(<\/span>body<\/span>)<\/span> ><\/span> 5<\/span>),<\/span>\r\n    is_draft<\/span> boolean<\/span> default<\/span> TRUE<\/span>,<\/span>\r\n    created<\/span> timestamp<\/span> default<\/span> 'now'<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
                        \n
                      • \n
                          not null: null\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u4ed8\u3051\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n
                           <\/p>\n
                            \n
                          • \n
                              unique: \u4e00\u610f\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n
                               <\/p>\n
                                \n
                              • \n
                                  check: \u5165\u529b\u5185\u5bb9\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n
                                   <\/p>\n
                                    \n
                                  • \n
                                      default: null\u30c7\u30fc\u30bf\u306e\u5834\u5408\u3001\u521d\u671f\u5024\u3092\u4ee3\u5165<\/ul>\n<\/li>\n<\/ul>\n
                                       <\/p>\n
                                        primary key (not null, qnique): \u4e3b\u30ad\u30fc\u306b\u3059\u308b<\/ul>\n
                                        \u63d2\u5165\u6587\u672c<\/h2>\n
                                        \u6211\u4eec\u5148\u91cd\u65b0\u6784\u5efa\u684c\u5b50\u5427\u3002<\/p>\n
                                        \u521b\u5efa\u540d\u4e3a\u201cpoststable.sql\u201d\u7684\u5916\u90e8\u6587\u4ef6\u3002<\/h3>\n
                                        create<\/span> table<\/span> posts<\/span>(<\/span>\r\n    id<\/span> serial<\/span> primary<\/span> key<\/span>,<\/span>\r\n    title<\/span> varchar<\/span>(<\/span>255<\/span>)<\/span> not<\/span> null<\/span>,<\/span>\r\n    body<\/span> text<\/span> check<\/span>(<\/span>length<\/span>(<\/span>body<\/span>)<\/span> ><\/span> 5<\/span>),<\/span>\r\n    is_draft<\/span> boolean<\/span> default<\/span> TRUE<\/span>,<\/span>\r\n    created<\/span> timestamp<\/span> default<\/span> 'now'<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
                                        \u8fde\u63a5\u81f3blogapp<\/h3>\n
                                        $ psql blogapp -U postgres -p 5433\r\n<\/code><\/pre>\n
                                        postgres=# \\c blogapp;\r\n<\/code><\/pre>\n
                                        \u5220\u9664posts\u8868<\/h3>\n
                                        blogapp<\/span>=#<\/span> drop<\/span> table<\/span> posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u91cd\u5efa\u5c3e\u5df4<\/h3>\n
                                        blogapp=# \\i commands.sql\r\n<\/code><\/pre>\n
                                        \u786e\u5b9a<\/h3>\n
                                        blogapp=# \\dt\r\nblogapp=# \\d posts\r\n<\/code><\/pre>\n
                                        \u63d2\u5165\u6570\u636e<\/h3>\n
                                        blogapp<\/span>=#<\/span> insert<\/span> into<\/span> posts<\/span> (<\/span>title<\/span>,<\/span> body<\/span>)<\/span> values<\/span> (<\/span>'title1'<\/span>,<\/span> 'body11111'<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                        \u786e\u8ba4\u6570\u636e<\/h3>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u63d2\u5165\u6570\u636e<\/h3>\n
                                        blogapp<\/span>=#<\/span> insert<\/span> into<\/span> posts<\/span> (<\/span>title<\/span>,<\/span> body<\/span>)<\/span> values<\/span> (<\/span>'title2'<\/span>,<\/span> 'body22222'<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                        \u67e5\u770b\u6570\u636e (ch\u00e1 sh\u00f9 j\u00f9)<\/h3>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u5982\u679cbody\u7684\u957f\u5ea6\u5c0f\u4e8e\u7b49\u4e8e5\u4e2a\u5b57\u7b26\uff0c\u5c31\u65e0\u6cd5\u63d2\u5165\u3002<\/h3>\n
                                        blogapp<\/span>=#<\/span> insert<\/span> into<\/span> posts<\/span> (<\/span>title<\/span>,<\/span> body<\/span>)<\/span> values<\/span> (<\/span>'title3'<\/span>,<\/span> 'b3'<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                        \u9009\u62e9\u6587\u4ef6<\/h2>\n
                                        \u663e\u793a\u6240\u6709\u9879\u76ee<\/h3>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u5b9a\u4e49\u65b0\u7684\u8868\u683c<\/h3>\n
                                        create<\/span> table<\/span> users<\/span> (<\/span>\r\n    id<\/span> serial<\/span> primary<\/span> key<\/span>,<\/span>\r\n    name<\/span> varchar<\/span>(<\/span>255<\/span>),<\/span>\r\n    score<\/span> real<\/span>,<\/span>\r\n    team<\/span> varchar<\/span>(<\/span>255<\/span>)<\/span>\r\n);<\/span>\r\n<\/code><\/pre>\n
                                        \u63d2\u5165\u51e0\u4e2a\u6570\u636e<\/h3>\n
                                        insert<\/span> into<\/span> users<\/span> (<\/span>name<\/span>,<\/span> score<\/span>,<\/span> team<\/span>)<\/span> values<\/span>\r\n(<\/span>'yamada'<\/span>,<\/span> 5<\/span>.<\/span>5<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'sato'<\/span>,<\/span> 8<\/span>.<\/span>3<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'saito'<\/span>,<\/span> 6<\/span>.<\/span>4<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'takahashi'<\/span>,<\/span> 2<\/span>.<\/span>2<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'suzuki'<\/span>,<\/span> 5<\/span>.<\/span>0<\/span>,<\/span> 'green'<\/span>),<\/span>\r\n(<\/span>'nomura'<\/span>,<\/span> 4<\/span>.<\/span>6<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'imai'<\/span>,<\/span> 4<\/span>.<\/span>7<\/span>,<\/span> 'green'<\/span>),<\/span>\r\n(<\/span>'yamazaki'<\/span>,<\/span> 7<\/span>.<\/span>1<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'yamasaki'<\/span>,<\/span> 3<\/span>.<\/span>9<\/span>,<\/span> 'green'<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                        \u786e\u8ba4\u6570\u636e<\/h3>\n
                                        blogapp=# \\d users\r\n<\/code><\/pre>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u5f00\u542f\u6269\u5c55\u663e\u793a<\/h3>\n
                                        \u5f53\u6570\u636e\u91cf\u8f83\u5927\u65f6\uff0c\u5c06\u5176\u7eb5\u5411\u6392\u5217\u4ee5\u4fbf\u4e8e\u67e5\u770b\u3002<\/p>\n
                                        blogapp=# \\x\r\n<\/code><\/pre>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u5173\u6389\u6269\u5c55\u663e\u793a<\/h3>\n
                                        \u518d\u6b21\u6267\u884c\u3002<\/p>\n
                                        blogapp=# \\x\r\n<\/code><\/pre>\n
                                        \u53ea\u83b7\u53d6\u67d0\u4e9b\u5b57\u6bb5<\/h3>\n
                                        blogapp<\/span>=#<\/span> select<\/span> name<\/span>,<\/span> score<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u53e5\u5b50\u7684\u5730\u65b9\u3002<\/h2>\n
                                        \u83b7\u53d6\u5206\u6570\u4e3a4.0\u4ee5\u4e0a\u7684\u6570\u636e<\/h3>\n
                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> score<\/span> ><\/span> 4<\/span>.<\/span>0<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                        \u5728\u6bd4\u8f83\u4e2d\u4f7f\u7528\u7684\u8fd0\u7b97\u7b26<\/h3>\n
                                          \n
                                        • \n
                                            > : \u3088\u308a\u5927\u304d\u3044<\/ul>\n<\/li>\n<\/ul>\n
                                             <\/p>\n
                                              \n
                                            • \n
                                                < : \u3088\u308a\u5c0f\u3055\u3044 >= : \u4ee5\u4e0a<\/ul>\n<\/li>\n<\/ul>\n
                                                 <\/p>\n
                                                  \n
                                                • \n
                                                    >= : \u4ee5\u4e0b<\/ul>\n<\/li>\n<\/ul>\n
                                                     <\/p>\n
                                                      \n
                                                    • \n
                                                        = : \u7b49\u3057\u3044<\/ul>\n<\/li>\n<\/ul>\n
                                                         <\/p>\n
                                                          \n
                                                        • \n
                                                            <> : \u7570\u306a\u308b<\/ul>\n<\/li>\n<\/ul>\n
                                                             <\/p>\n
                                                              != : \u7570\u306a\u308b<\/ul>\n
                                                              \u83b7\u53d6\u5f97\u5206\u4e3a5\u7684\u6570\u636e<\/h3>\n
                                                              blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> score<\/span> =<\/span> 5<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                              \u83b7\u53d6\u5206\u6570\u4e0d\u7b49\u4e8e5\u7684\u6570\u636e\u3002<\/h3>\n
                                                              blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> score<\/span> !=<\/span> 5<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                              \u83b7\u53d6\u540d\u4e3a’yamada’\u7684\u6570\u636e<\/h3>\n
                                                              blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> name<\/span> =<\/span> 'yamada'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                              \u7528\u4e8e\u6a21\u7cca\u641c\u7d22\u7684\u8fd0\u7b97\u7b26\u3002<\/h3>\n
                                                                \n
                                                              • \n
                                                                  like<\/ul>\n<\/li>\n<\/ul>\n
                                                                   <\/p>\n
                                                                    \n
                                                                  • \n
                                                                      % : \u4efb\u610f\u306e\u6587\u5b57<\/ul>\n<\/li>\n<\/ul>\n
                                                                       <\/p>\n
                                                                        – : \u4efb\u610f\u306e\u4e00\u6587\u5b57<\/ul>\n
                                                                        \u83b7\u53d6\u4ee5i\u7ed3\u5c3e\u7684name\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u6570\u636e\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> name<\/span> like<\/span> '%i'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u540d\u4e3a\u5c71\u5d0e\uff08Yamazaki\uff09\u548c\u5c71\u5d0e\uff08Yamasaki\uff09\u7684\u6570\u636e\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> name<\/span> like<\/span> 'yama_aki'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u540d\u4e3aSato\u548cSaito\u7684\u6570\u636e\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> where<\/span> name<\/span> like<\/span> 'sa%to'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u6392\u5e8f\u3001\u9650\u5236\u3001\u504f\u79fb<\/h2>\n
                                                                        \u5c06\u5206\u6570\u6309\u5347\u5e8f\u6392\u5e8f\u5e76\u83b7\u53d6<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> score<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5c06\u5f97\u5206\u6309\u964d\u5e8f\u6392\u5e8f\u5e76\u83b7\u53d6<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> score<\/span> desc<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5c06\u56e2\u961f\u6309\u964d\u5e8f\u6392\u5e8f\u5e76\u83b7\u53d6<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> team<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u964d\u5e8f\u6392\u5e8f\u56e2\u961f\u5e76\u6309\u5f97\u5206\u964d\u5e8f\u83b7\u53d6<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> team<\/span>,<\/span> score<\/span> desc<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5c06\u56e2\u961f\u548c\u5f97\u5206\u6309\u964d\u5e8f\u8fdb\u884c\u6392\u5e8f\u5e76\u83b7\u53d6\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> team<\/span> desc<\/span>,<\/span> score<\/span> desc<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u9650\u5236\u6570\u636e\u83b7\u53d6\u7684\u6570\u91cf<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> limit<\/span> 3<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u4ece\u7b2c4\u4e2a\u9879\u76ee\u5f00\u59cb\u76843\u4e2a\u9879\u76ee\u7684\u6570\u636e<\/h3>\n
                                                                        \u7d22\u5f15\u4ece0\u5f00\u59cb\u3002<\/p>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> limit<\/span> 3<\/span> offset<\/span> 3<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u524d\u4e09\u540d\u5f97\u5206\u7684\u6570\u636e\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> score<\/span> desc<\/span> limit<\/span> 3<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u8bb0\u5f55\u7684\u6c47\u603b<\/h2>\n
                                                                        \u83b7\u53d6users\u8868\u7684\u8bb0\u5f55\u6570<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> count<\/span>(<\/span>*<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u4f7f\u5f97team\u5b57\u6bb5\u503c\u552f\u4e00\u7684\u6570\u636e<\/h3>\n
                                                                        \u4f60\u53ef\u4ee5\u4ece\u6570\u636e\u4e2d\u5220\u9664\u91cd\u590d\u9879\u5e76\u83b7\u53d6\u7ed3\u679c\u3002<\/p>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> distinct<\/span> team<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u5f97\u5206\u7684\u603b\u548c<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> sum<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u5206\u6570\u7684\u6700\u5927\u503c<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> max<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u5206\u6570\u7684\u6700\u5c0f\u503c<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> min<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u5206\u6570\u7684\u5e73\u5747\u503c<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> avg<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u6bcf\u4e2a\u56e2\u961f\u7684\u603b\u8ba1<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> team<\/span>,<\/span> sum<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span> group<\/span> by<\/span> team<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u6839\u636e\u6761\u4ef6\u8fdb\u884c\u7edf\u8ba1<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> team<\/span>,<\/span> sum<\/span>(<\/span>score<\/span>)<\/span> from<\/span> users<\/span> group<\/span> by<\/span> team<\/span> having<\/span> sum<\/span>(<\/span>score<\/span>)<\/span> ><\/span> 10<\/span>.<\/span>0<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u529f\u80fd<\/h2>\n
                                                                        \u6587\u6863
                                                                        \nhttp:\/\/www.postgresql.org\/docs\/9.3\/static\/functions.html<\/p>\n
                                                                        \u83b7\u53d6name\u7684\u5b57\u7b26\u6570<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> name<\/span>,<\/span> length<\/span>(<\/span>name<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5408\u5e76\u6587\u672c\u5b57\u7b26\u4e32<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> concat<\/span>(<\/span>name<\/span>,<\/span> ' ('<\/span>,<\/span> team<\/span>,<\/span> ') '<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u66f4\u6539\u5b57\u6bb5\u540d\u79f0\u5e76\u8fdb\u884c\u83b7\u53d6\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> concat<\/span>(<\/span>name<\/span>,<\/span> ' ('<\/span>,<\/span> team<\/span>,<\/span> ') '<\/span>)<\/span> as<\/span> namelabel<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> substring<\/span>(<\/span>team<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>)<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> substring<\/span>(<\/span>team<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>)<\/span> as<\/span> teaminitial<\/span> from<\/span> users<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u83b7\u53d6\u968f\u673a\u6570<\/h3>\n
                                                                        \u751f\u6210\u4ece0\u52301\u4e4b\u95f4\u7684\u968f\u673a\u6570\u3002<\/p>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> random<\/span>();<\/span>\r\n<\/code><\/pre>\n
                                                                        \u968f\u673a\u83b7\u53d6\u4e00\u6761\u8bb0\u5f55\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span> order<\/span> by<\/span> random<\/span>()<\/span> limit<\/span> 1<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u66f4\u65b0\u8bb0\u5f55\uff0c\u5220\u9664\u8bb0\u5f55<\/h2>\n
                                                                        \u66f4\u65b0yamada\u7684\u5206\u6570<\/h3>\n
                                                                        \u6ce8\u610f\uff1a\u5982\u679c\u4e0d\u6307\u5b9a\u53e5\u5b50\uff0c\u5c06\u66f4\u65b0\u6240\u6709\u6761\u76ee\u3002<\/p>\n
                                                                        blogapp<\/span>=#<\/span> update<\/span> users<\/span> set<\/span> score<\/span> =<\/span> 5<\/span>.<\/span>8<\/span> where<\/span> name<\/span> =<\/span> 'yamada'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u53ea\u6709\u7ea2\u961f\u5c06\u5f97\u5206\u52a01\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> update<\/span> users<\/span> set<\/span> score<\/span> =<\/span> score<\/span> +<\/span> 1<\/span> where<\/span> team<\/span> =<\/span> 'red'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u53ef\u4ee5\u6307\u5b9a\u591a\u4e2awhere\u53e5\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> update<\/span> users<\/span> set<\/span> score<\/span> =<\/span> score<\/span> +<\/span> 1<\/span> where<\/span> team<\/span> =<\/span> 'red'<\/span> or<\/span> team<\/span> =<\/span> 'green'<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5220\u9664\u5206\u6570\u4f4e\u4e8e3.0\u7684\u6570\u636e\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> delete<\/span> from<\/span> users<\/span> where<\/span> score<\/span> <<\/span> 3<\/span>.<\/span>0<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u4fee\u6539\u8868\u7ed3\u6784<\/h2>\n
                                                                        \u5728\u8868\u683c\u4e2d\u6dfb\u52a0\u5b57\u6bb5<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> alter<\/span> table<\/span> users<\/span> add<\/span> fullname<\/span> varchar<\/span>(<\/span>255<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u4ece\u8868\u4e2d\u5220\u9664\u5b57\u6bb5\u3002<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> alter<\/span> table<\/span> users<\/span> drop<\/span> fullname<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u4fee\u6539\u5b57\u6bb5\u540d\u79f0<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> alter<\/span> table<\/span> users<\/span> rename<\/span> name<\/span> to<\/span> myname<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u66f4\u6539\u5b57\u6bb5\u7684\u6570\u636e\u7c7b\u578b<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> alter<\/span> table<\/span> users<\/span> alter<\/span> myname<\/span> type<\/span> varchar<\/span>(<\/span>32<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u6dfb\u52a0\u7d22\u5f15\u3002<\/h3>\n
                                                                        \u641c\u7d22\u901f\u5ea6\u4f1a\u53d8\u5feb\uff0c\u4f46\u66f4\u65b0\u548c\u6dfb\u52a0\u64cd\u4f5c\u4f1a\u53d8\u6162\u3002<\/p>\n
                                                                        blogapp<\/span>=#<\/span> create<\/span> index<\/span> team_index<\/span> on<\/span> users<\/span>(<\/span>team<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u5220\u9664\u7d22\u5f15<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> drop<\/span> index<\/span> team_index<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\d users;\r\n<\/code><\/pre>\n
                                                                        \u8868\u683c\u7684\u5408\u5e76<\/h2>\n
                                                                        \u91cd\u65b0\u5236\u4f5c\u684c\u5b50<\/h3>\n
                                                                        drop<\/span> table<\/span> users<\/span>;<\/span>\r\ndrop<\/span> table<\/span> posts<\/span>;<\/span>\r\ncreate<\/span> table<\/span> posts<\/span>(<\/span>\r\n    id<\/span> serial<\/span> primary<\/span> key<\/span>,<\/span>\r\n    user_id<\/span> int<\/span> not<\/span> null<\/span>,<\/span>\r\n    title<\/span> varchar<\/span>(<\/span>255<\/span>)<\/span> not<\/span> null<\/span>,<\/span>\r\n    body<\/span> text<\/span> not<\/span> null<\/span>\r\n);<\/span>\r\ninsert<\/span> into<\/span> posts<\/span> (<\/span>user_id<\/span>,<\/span> title<\/span>,<\/span> body<\/span>)<\/span> values<\/span>\r\n(<\/span>1<\/span>,<\/span> 'title1'<\/span>,<\/span> 'body1'<\/span>),<\/span>\r\n(<\/span>1<\/span>,<\/span> 'title2'<\/span>,<\/span> 'body2'<\/span>),<\/span>\r\n(<\/span>2<\/span>,<\/span> 'title3'<\/span>,<\/span> 'body3'<\/span>),<\/span>\r\n(<\/span>5<\/span>,<\/span> 'title4'<\/span>,<\/span> 'body4'<\/span>),<\/span>\r\n(<\/span>4<\/span>,<\/span> 'title5'<\/span>,<\/span> 'body5'<\/span>);<\/span>\r\ncreate<\/span> table<\/span> users<\/span> (<\/span>\r\n    id<\/span> serial<\/span> primary<\/span> key<\/span>,<\/span>\r\n    name<\/span> varchar<\/span>(<\/span>255<\/span>),<\/span>\r\n    score<\/span> real<\/span>,<\/span>\r\n    team<\/span> varchar<\/span>(<\/span>255<\/span>)<\/span>\r\n);<\/span>\r\ninsert<\/span> into<\/span> users<\/span> (<\/span>name<\/span>,<\/span> score<\/span>,<\/span> team<\/span>)<\/span> values<\/span>\r\n(<\/span>'yamada'<\/span>,<\/span> 5<\/span>.<\/span>5<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'sato'<\/span>,<\/span> 8<\/span>.<\/span>3<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'saito'<\/span>,<\/span> 6<\/span>.<\/span>4<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'takahashi'<\/span>,<\/span> 2<\/span>.<\/span>2<\/span>,<\/span> 'blue'<\/span>),<\/span>\r\n(<\/span>'suzuki'<\/span>,<\/span> 5<\/span>.<\/span>0<\/span>,<\/span> 'green'<\/span>),<\/span>\r\n(<\/span>'nomura'<\/span>,<\/span> 4<\/span>.<\/span>6<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'imai'<\/span>,<\/span> 4<\/span>.<\/span>7<\/span>,<\/span> 'green'<\/span>),<\/span>\r\n(<\/span>'yamazaki'<\/span>,<\/span> 7<\/span>.<\/span>1<\/span>,<\/span> 'red'<\/span>),<\/span>\r\n(<\/span>'yamasaki'<\/span>,<\/span> 3<\/span>.<\/span>9<\/span>,<\/span> 'green'<\/span>);<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> users<\/span>;<\/span>\r\nblogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u4ece\u591a\u4e2a\u8868\u4e2d\u83b7\u53d6\u6570\u636e de<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> users<\/span>.<\/span>name<\/span>,<\/span> posts<\/span>.<\/span>title<\/span> from<\/span> users<\/span>,<\/span> posts<\/span> where<\/span> users<\/span>.<\/span>id<\/span> =<\/span> posts<\/span>.<\/span>user_id<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u5c06\u8868\u683c\u540d\u79f0\u7f29\u77ed\u5e76\u5408\u5e76<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> u<\/span>.<\/span>name<\/span>,<\/span> p<\/span>.<\/span>title<\/span> from<\/span> users<\/span> u<\/span>,<\/span> posts<\/span> p<\/span> where<\/span> u<\/span>.<\/span>id<\/span> =<\/span> p<\/span>.<\/span>user_id<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u589e\u52a0\u6761\u4ef6<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> u<\/span>.<\/span>name<\/span>,<\/span> p<\/span>.<\/span>title<\/span> from<\/span> users<\/span> u<\/span>,<\/span> posts<\/span> p<\/span> where<\/span> u<\/span>.<\/span>id<\/span> =<\/span> p<\/span>.<\/span>user_id<\/span> and<\/span> u<\/span>.<\/span>id<\/span> =<\/span> 1<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u8fd9\u4e2a\u89d2\u5ea6\u6216\u89c6\u89d2<\/h2>\n
                                                                        \u521b\u5efa\u89c6\u56fe<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> create<\/span> view<\/span> yamada_posts<\/span> as<\/span> select<\/span> u<\/span>.<\/span>name<\/span>,<\/span> p<\/span>.<\/span>title<\/span> from<\/span> users<\/span> u<\/span>,<\/span> posts<\/span> p<\/span> where<\/span> u<\/span>.<\/span>id<\/span> =<\/span> p<\/span>.<\/span>user_id<\/span> and<\/span> u<\/span>.<\/span>id<\/span> =<\/span> 1<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4\u89c6\u56fe<\/h3>\n
                                                                        blogapp=# \\dv\r\n<\/code><\/pre>\n
                                                                        \u4ece\u89c6\u56fe\u4e2d\u83b7\u53d6\u6570\u636e<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> select<\/span> *<\/span> from<\/span> yamada_posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u79fb\u9664\u89c6\u56fe<\/h3>\n
                                                                        blogapp<\/span>=#<\/span> drop<\/span> view<\/span> yamada_posts<\/span>;<\/span>\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# \\dv\r\n<\/code><\/pre>\n
                                                                        \u4ea4\u6613<\/h2>\n
                                                                        \u5f00\u59cb\u4ea4\u6613<\/h3>\n
                                                                        blogapp=# begin;\r\n<\/code><\/pre>\n
                                                                        \u4ece\u5c71\u7530\u7684\u5206\u6570\u4e2d\u51cf\u53bb1\u3002<\/h3>\n
                                                                        blogapp=# update users set score = score - 1.0 where name = 'yamada';\r\n<\/code><\/pre>\n
                                                                        \u7ed9Sato\u7684\u5206\u6570\u52a01<\/h3>\n
                                                                        blogapp=# update users set score = score + 1.0 where name = 'sato';\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# select * from users;\r\n<\/code><\/pre>\n
                                                                        \u8868\u8fbe<\/h3>\n
                                                                        blogapp=# commit;\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# select * from users;\r\n<\/code><\/pre>\n
                                                                        \u5f00\u59cb\u4ea4\u6613<\/h3>\n
                                                                        blogapp=# begin;\r\n<\/code><\/pre>\n
                                                                        \u4ece\u5c71\u7530\u7684\u5206\u6570\u4e2d\u51cf\u53bb1\u3002<\/h3>\n
                                                                        blogapp=# update users set score = score - 1.0 where name = 'yamada';\r\n<\/code><\/pre>\n
                                                                        \u7ed9sato\u7684\u5f97\u5206\u52a01<\/h3>\n
                                                                        blogapp=# update users set score = score + 1.0 where name = 'sato';\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# select * from users;\r\n<\/code><\/pre>\n
                                                                        \u53d6\u6d88<\/h3>\n
                                                                        blogapp=# rollback;\r\n<\/code><\/pre>\n
                                                                        \u786e\u8ba4<\/h3>\n
                                                                        blogapp=# select * from users;\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                                                                        \u786e\u8ba4\u7248\u672c $ psql –version $ psql -V \u767b\u5f55 -U \u30e6\u30fc\u30b6\u540d   -p \u30dd\u30fc […]<\/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-41398","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nPostgreSQL\u7684CRUD\u64cd\u4f5c - 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\/postgresql\u7684crud\u64cd\u4f5c\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL\u7684CRUD\u64cd\u4f5c\" \/>\n<meta property=\"og:description\" content=\"\u786e\u8ba4\u7248\u672c $ psql --version $ psql -V \u767b\u5f55 -U \u30e6\u30fc\u30b6\u540d   -p \u30dd\u30fc […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/postgresql\u7684crud\u64cd\u4f5c\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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