{"id":41648,"date":"2023-10-02T05:28:58","date_gmt":"2023-01-01T00:14:24","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%93%8d%e4%bd%9cpostgresql%e7%9a%84%e8%a1%a8%e6%a0%bc\/"},"modified":"2024-01-15T11:05:44","modified_gmt":"2024-01-15T03:05:44","slug":"%e6%93%8d%e4%bd%9cpostgresql%e7%9a%84%e8%a1%a8%e6%a0%bc","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%93%8d%e4%bd%9cpostgresql%e7%9a%84%e8%a1%a8%e6%a0%bc\/","title":{"rendered":"\u64cd\u4f5cPostgreSQL\u7684\u8868\u683c"},"content":{"rendered":"

\u5173\u4e8ePostgreSQL\u8868\u64cd\u4f5c\u7684\u7b80\u8981\u8bf4\u660e\u3002<\/p>\n

\u8fd9\u6b21\u6211\u4eec\u4f1a\u5728hoge\u6570\u636e\u5e93\u4e2d\u521b\u5efa\u4e00\u4e2acustomer\u8868\uff0c\u5e76\u63d2\u5165\u987e\u5ba2\u4fe1\u606f\u8fdb\u53bb\u3002<\/p>\n

\u4ee5\u4e0b\u662f3\u4f4d\u987e\u5ba2\u7684\u4fe1\u606f\u3002<\/p>\n

\n
IDnameage0001\u5c71\u7530\u592a\u90ce290002\u4e2d\u6751\u82b1\u5b50-0003\u4f50\u85e4\u4fe1\u4e4b91<\/div>\n<\/div>\n

\u5236\u4f5c\u684c\u5b50\u7684\u5e95\u5ea7<\/h2>\n

\u9996\u5148\uff0c\u6211\u4eec\u5c06\u5728hogeDB\u4e2d\u521b\u5efacustomer\u8868\u3002
\n\u4e3a\u4e86\u4f7f\u7a0b\u5e8f\u5728\u5206\u53f7\u4e4b\u524d\u6267\u884c\uff0c\u6309\u7167\u5217\u8fdb\u884c\u884c\u62c6\u5206\u662f\u4e00\u6761\u89c4\u5219\uff0c\u4f7f\u5176\u6613\u4e8e\u9605\u8bfb\u3002<\/p>\n

\u8981\u5c06\u4e0a\u8ff0\u8868\u683c\u5d4c\u5165\u5230\u8868\u683c\u4e2d\uff0c\u53ef\u4f7f\u7528\u4ee5\u4e0b\u7684\u4ee3\u7801\u3002\u63a5\u4e0b\u6765\uff0c\u9010\u884c\u89e3\u91ca\u8fd9\u6bb5\u4ee3\u7801\u3002<\/p>\n

hoge<\/span>=#<\/span> CREATE<\/span> TABLE<\/span> Customer<\/span>\r\nhoge<\/span>-#<\/span> (<\/span>id<\/span>   char<\/span>(<\/span>4<\/span>)<\/span>   NOT<\/span> NULL<\/span>,<\/span>\r\nhoge<\/span>(<\/span>#<\/span> name<\/span>  varchar<\/span>   NOT<\/span> NULL<\/span>,<\/span>\r\nhoge<\/span>(<\/span>#<\/span> age<\/span>   INTEGER<\/span>   ,<\/span>\r\nhoge<\/span>(<\/span>#<\/span> PRIMARY<\/span> KEY<\/span> (<\/span>id<\/span>));<\/span>\r\nCREATE<\/span> TABLE<\/span>\r\n<\/code><\/pre>\n
\u521b\u5efa\u8868\u7684\u58f0\u660e\uff08\u7b2c\u4e00\u884c\uff09<\/h3>\n
\u9996\u5148\uff0c\u5728<\u8868\u540d>\u4e2d\u521b\u5efa\u8868\u7684\u58f0\u660e\u3002<\/p>\n
CREATE<\/span> TABLE<\/span> Customer<\/span>\r\n<\/code><\/pre>\n
\u5bf9\u4e8e\u7b2c2\u81f3\u7b2c4\u884c\u7684\u5217\u8bbe\u7f6e<\/h3>\n
\u56e0\u4e3a\u672c\u6b21\u7684\u5217\u662fID\u3001\u59d3\u540d\u548c\u5e74\u9f84\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\u6211\u4f1a\u5206\u522b\u5bf9\u6bcf\u4e2a\u5217\u8fdb\u884c\u7b80\u6d01\u660e\u4e86\u7684\u4e00\u884c\u63cf\u8ff0\u3002<\/p>\n
\u4f5c\u4e3a\u4e66\u5199\u65b9\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528<\u5217> <\u7c7b\u578b> <\u7ea6\u675f>\u3002\u6bcf\u4e2a\u5217\u4e4b\u95f4\u7528\u9017\u53f7\u5206\u9694\u3002<\/p>\n
[\u8eab\u4efd\u8bc1\u5217]<\/h4>\n
id\u88ab\u56fa\u5b9a\u4e3a4\u4e2a\u5b57\u7b26\u957f\u5ea6\u7684char\u578b\uff0c\u5e76\u4e14\u4f5c\u4e3a\u4e3b\u952e\uff0c\u6240\u4ee5\u5728\u7ea6\u675f\u90e8\u5206\u5305\u542b\u4e86NOT NULL\u4ee5\u9632\u6b62\u7a7a\u767d\u3002<\/p>\n
id<\/span>   char<\/span>(<\/span>4<\/span>)<\/span>   NOT<\/span> NULL<\/span>,<\/span>\r\n<\/code><\/pre>\n
[\u59d3\u540d\u680f]<\/h4>\n
\u6839\u636e\u53ef\u53d8\u5b57\u7b26\u957f\u5ea6\u7684varchar\u7c7b\u578b\u6307\u5b9aname\uff0c\u5e76\u4e14\u4e0d\u80fd\u4e3a\u7a7a\u683c\uff0c\u6240\u4ee5\u4e0d\u80fd\u4e3aNULL\u3002<\/p>\n
name<\/span>  varchar<\/span>  NOT<\/span> NULL<\/span>,<\/span>\r\n<\/code><\/pre>\n
\u3010\u5e74\u9f84\u680f\u3011<\/h4>\n
\u5e74\u9f84\u8bbe\u7f6e\u4e3a\u6574\u6570\u5e76\u4e14\u6ca1\u6709\u4efb\u4f55\u9650\u5236\uff08\u5141\u8bb8\u4e3a\u7a7a\u63d2\u5165\uff09\u3002<\/p>\n
age<\/span>   INTEGER<\/span>   ,<\/span>\r\n<\/code><\/pre>\n
\u8bbe\u7f6e\u4e3b\u952e\uff08\u7b2c5\u884c\uff09<\/h3>\n
\u7531\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u6982\u5ff5\u88ab\u7834\u574f\uff0c\u6240\u4ee5\u8981\u786e\u4fdd\u660e\u786e\u6307\u5b9a\u4e3b\u952e\u3002\u5199\u6cd5\u662fPRIMARY KEY (<\u4e3b\u952e>)\u3002<\/p>\n
PRIMARY<\/span> KEY<\/span> (<\/span>id<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u684c\u5b50\u5e95\u5ea7\u8bbe\u7f6e\u5b8c\u6210\u4e86\u3002<\/p>\n
\u786e\u8ba4\u684c\u5b50\u7684\u5e95\u5ea7<\/h2>\n
\u53ef\u4ee5\u4f7f\u7528psql\u7684\\d\u547d\u4ee4\u6765\u786e\u8ba4\u662f\u5426\u5df2\u7ecf\u521b\u5efa\u4e86\u521a\u521a\u5236\u4f5c\u7684customer\u8868\u3002<\/p>\n
hoge<\/span>=#<\/span> \\<\/span>d<\/span>\r\n         List<\/span> of<\/span> relations<\/span>\r\n Schema<\/span> |<\/span>   Name<\/span>   |<\/span> Type<\/span>  |<\/span>    Owner<\/span>   \r\n--------+----------+-------+-------------<\/span>\r\n public<\/span> |<\/span> customer<\/span> |<\/span> table<\/span> |<\/span> sf213471118<\/span>\r\n(<\/span>1<\/span> row<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5728\u684c\u5b50\u4e0a\u63d2\u5165\u8bb0\u5f55<\/h2>\n
\u63d2\u5165\u5531\u7247\u6709\u4e24\u79cd\u65b9\u6cd5\u3002<\/p>\n
\u5982\u679c\u8981\u6307\u5b9a\u5217\u540d\u8fdb\u884c\u63d2\u5165\u7684\u8bdd<\/h3>\n
\u5982\u679c\u6709\u7a7a\u767d\u7684\u90e8\u5206\u6216\u8005\u9700\u8981\u6539\u53d8\u987a\u5e8f\uff0c\u8fd9\u4f1a\u66f4\u52a0\u65b9\u4fbf\u3002
\n\u5e74\u9f84\u680f\u672a\u586b\u5199\u7684\u8fd9\u6761\u8bb0\u5f55\u53ef\u4ee5\u8fd9\u6837\u63cf\u8ff0\u3002<\/p>\n
hoge<\/span>=#<\/span> INSERT<\/span> INTO<\/span> Customer<\/span>(<\/span>id<\/span>,<\/span> name<\/span>)<\/span>\r\nVALUES<\/span>(<\/span>'0002'<\/span>,<\/span>'\u4e2d\u6751\u82b1\u5b50'<\/span>);<\/span>\r\nINSERT<\/span> 0<\/span> 1<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\uff0c\u4ea4\u6362\u987a\u5e8f\u4e5f\u6ca1\u95ee\u9898\u3002<\/p>\n
hoge<\/span>=#<\/span> INSERT<\/span> INTO<\/span> Customer<\/span>(<\/span>name<\/span>,<\/span> id<\/span>)<\/span>\r\nVALUES<\/span>(<\/span>'\u52a0\u85e4\u91cc\u5b50'<\/span>,<\/span>`8888`<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u7701\u7565\u5217\u540d\u63d2\u5165\u7684\u8bdd<\/h3>\n
\u5f53\u60f3\u8981\u63d2\u5165\u6240\u6709\u7684\u503c\u65f6\uff0c\u8fd9\u662f\u5f88\u65b9\u4fbf\u7684\u3002
\n\u867d\u7136\u8fd9\u6837\u66f4\u8f7b\u677e\uff0c\u4f46\u5fc5\u987b\u6309\u987a\u5e8f\u9010\u4e2a\u8fdb\u884c\u8d4b\u503c\u3002<\/p>\n
hoge<\/span>=#<\/span> INSERT<\/span> INTO<\/span> Customer<\/span> VALUES<\/span>(<\/span>'0003'<\/span>,<\/span>'\u4f50\u85e4\u4fe1\u4e4b'<\/span>,<\/span>91<\/span>);<\/span>\r\nINSERT<\/span> 0<\/span> 1<\/span>\r\n<\/code><\/pre>\n
\u67e5\u770b\u684c\u5b50\u91cc\u9762\u7684\u5185\u5bb9<\/h2>\n
\u7531\u4e8e\u5df2\u7ecf\u63d2\u5165\u4e86\u6240\u6709\u5ba2\u6237\u8bb0\u5f55\uff0c\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528SQL\u8bed\u53e5\u8fdb\u884c\u786e\u8ba4\u3002
\n\u4f7f\u7528SELECT FROM<\/p>\n
;\u5c31\u53ef\u4ee5\u4e86\u3002\u8fd9\u6b21\u6211\u4eec\u60f3\u8981\u67e5\u770b\u5217\u8868\uff0c\u6240\u4ee5\u5c06column\u8bbe\u4e3a*\u3002hoge<\/span>=#<\/span> SELECT<\/span> *<\/span> FROM<\/span> Customer<\/span>;<\/span>
\n  id<\/span>  |<\/span>   name<\/span>   |<\/span> age<\/span>
\n------+----------+-----<\/span>
\n 0001<\/span> |<\/span> \u5c71\u7530\u592a\u90ce<\/span>  |<\/span> 29<\/span>
\n 0002<\/span> |<\/span> \u4e2d\u6751\u82b1\u5b50<\/span>  |<\/span>
\n 0003<\/span> |<\/span> \u4f50\u85e4\u4fe1\u4e4b<\/span>  |<\/span> 91<\/span>
\n(<\/span>3<\/span> rows<\/span>)<\/span>
\n<\/code>\u66f4\u65b0\u8868\u683c\u8bb0\u5f55\u4ee5\u4e0b\u662f\u63d2\u5165\u8bb0\u5f55\u7684\u793a\u4f8b\uff1a<\/p>\n
\n
<\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\u5982\u679c\u60f3\u8981\u8fdb\u884c\u6b64\u7c7b\u66f4\u6539<\/p>\n
\n
<\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
\u4ee5\u4ee5\u4e0b\u65b9\u5f0f\u63cf\u8ff0\u3002UPDATE<\/span> <<\/span>Table<\/span> name<\/span>><\/span> SET<\/span> <<\/span>column<\/span>><\/span> =<\/span> 'xxxxx'<\/span> WHERE<\/span> <<\/span>Primary<\/span> Key<\/span>><\/span> =<\/span>'vvvv'<\/span>;<\/span>
\n<\/code>\u9996\u5148\uff0c\u5c06\u4e2d\u6751\u82b1\u5b50\u66f4\u6539\u4e3a\u5742\u4e95\u82b1\u5b50\u3002hoge<\/span>=#<\/span> UPDATE<\/span> Staff<\/span> SET<\/span> name<\/span> =<\/span> '\u5742\u4e95\u82b1\u5b50'<\/span> WHERE<\/span> id<\/span> =<\/span>'0002'<\/span>;<\/span>
\nUPDATE<\/span> 1<\/span>
\n<\/code>\u6709\u5173\u6b64\u4e8b\u5df2\u5f97\u5230\u66f4\u65b0\u3002\u540c\u6837\uff0c\u5c06age\u7684\u503c\u4eceNULL\u66f4\u6539\u4e3a49\u8bd5\u4e00\u8bd5\u3002hoge<\/span>=#<\/span> UPDATE<\/span> Staff<\/span> SET<\/span> age<\/span> =<\/span> 49<\/span> WHERE<\/span> id<\/span> =<\/span>'0002'<\/span>;<\/span>
\nUPDATE<\/span> 1<\/span>
\n<\/code>\u5728\u8fd9\u4e00\u7cfb\u5217\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u5148\u521d\u6b65\u786e\u8ba4\u4e00\u4e0b\u8fd9\u5f20\u684c\u5b50\u3002hoge<\/span>=#<\/span> SELECT<\/span> *<\/span> FROM<\/span> Customer<\/span>;<\/span>
\n  id<\/span>  |<\/span>   name<\/span>   |<\/span> age<\/span>
\n------+----------+-----<\/span>
\n 0001<\/span> |<\/span> \u5c71\u7530\u592a\u90ce<\/span>  |<\/span>  29<\/span>
\n 0003<\/span> |<\/span> \u4f50\u85e4\u4fe1\u4e4b<\/span>  |<\/span>  91<\/span>
\n 0002<\/span> |<\/span> \u5742\u4e95\u82b1\u5b50<\/span>  |<\/span>  49<\/span>
\n<\/code>\u5df2\u5b8c\u6210\u4ee5\u4e0a\u4efb\u52a1\u3002\u6ce8\u610f\u4e8b\u9879\u5982\u679c\u4f7f\u7528UPDATE\u65f6\u4e0d\u6307\u5b9aWHERE = ‘vvvv’\uff0c\u5219\u4f1a\u5bfc\u81f4\u5217\u4e2d\u7684\u6240\u6709\u5185\u5bb9\u90fd\u88ab\u66f4\u6539\u3002\u8bd5\u9a8c\u6848\u4f8b\uff1ahoge<\/span>=#<\/span> UPDATE<\/span> Staff<\/span> SET<\/span> age<\/span> =<\/span> 49<\/span>;<\/span>
\n<\/code>\u5b9e\u65bd\u7ed3\u679c\uff1ahoge<\/span>=#<\/span> SELECT<\/span> *<\/span> FROM<\/span> Customer<\/span>;<\/span>
\n  id<\/span>  |<\/span>   name<\/span>   |<\/span> age<\/span>
\n------+----------+-----<\/span>
\n 0001<\/span> |<\/span> \u5c71\u7530\u592a\u90ce<\/span>  |<\/span>  49<\/span>
\n 0003<\/span> |<\/span> \u4f50\u85e4\u4fe1\u4e4b<\/span>  |<\/span>  49<\/span>
\n 0002<\/span> |<\/span> \u5742\u4e95\u82b1\u5b50<\/span>  |<\/span>  49<\/span>
\n<\/code>\u5c3d\u7ba1\u5c06\u6574\u4e2a\u8bb0\u5f55\u7684\u5217\u8bbe\u7f6e\u4e3a\u76f8\u540c\u7684\u503c\u4f3c\u4e4e\u5f88\u65b9\u4fbf\uff0c\u4f46\u4f3c\u4e4e\u4e0d\u4f1a\u88ab\u4f7f\u7528\u3002\u5220\u9664\u6570\u636e\u5220\u9664\u6570\u636e\u6709\u4e24\u79cd\u65b9\u5f0f\uff0c\u4e00\u79cd\u662f\u5220\u9664\u6307\u5b9a\u7684\u8bb0\u5f55\uff0c\u53e6\u4e00\u79cd\u662f\u5220\u9664\u5168\u90e8\u884c\u3002\u4f7f\u7528DELETE\u547d\u4ee4\u53ef\u4ee5\u8fdb\u884c\u6570\u636e\u5220\u9664\u64cd\u4f5c\u3002DELETE<\/span> FROM<\/span> <<\/span>Table<\/span> name<\/span>><\/span> WHERE<\/span> <<\/span>Primary<\/span> Key<\/span>><\/span> =<\/span> 'vvvv'<\/span>;<\/span>
\n<\/code>\u5b9e\u9645\u4e0a\u5220\u9664\u4ee5\u4e0b\u8bb0\u5f55<\/p>\n
\n
<\/div>\n<\/div>\n
\n
<\/div>\n<\/div>\n
hoge<\/span>=#<\/span> DELETE<\/span> FROM<\/span> Customer<\/span> WHERE<\/span> id<\/span>=<\/span>'0003'<\/span>;<\/span>
\nDELETE<\/span> 1<\/span>
\nhoge<\/span>=#<\/span> SELECT<\/span> *<\/span> FROM<\/span> Customer<\/span>;<\/span>
\n  id<\/span>  |<\/span>   name<\/span>   |<\/span> age<\/span>
\n------+----------+-----<\/span>
\n 0001<\/span> |<\/span> \u5c71\u7530\u592a\u90ce<\/span> |<\/span>  29<\/span>
\n 0002<\/span> |<\/span> \u5742\u4e95\u82b1\u5b50<\/span> |<\/span>  49<\/span>
\n(<\/span>2<\/span> rows<\/span>)<\/span>
\n<\/code>\u6211\u80fd\u786e\u8ba4\u5b83\u5df2\u7ecf\u88ab\u5f7b\u5e95\u5220\u9664\u4e86\u3002\u3010\u6ce8\u610f\u4e8b\u9879\u3011\u548cUPDATE\u7c7b\u4f3c\uff0c\u5f53\u4f7f\u7528DELETE\u65f6\uff0c\u5982\u679c\u4e0d\u4f7f\u7528WHERE = ‘vvvv’\u8fdb\u884c\u6307\u5b9a\uff0c\u5c06\u4f1a\u5220\u9664\u6240\u6709\u8bb0\u5f55\uff08\u5bfc\u81f4\u8868\u53d8\u4e3a\u7a7a\uff09\u3002\u5220\u9664\u8868\u683c\u5982\u679c\u8981\u5220\u9664\u8868\u672c\u8eab\uff0c\u8bf7\u4f7f\u7528DROP TABLE\u547d\u4ee4\u3002DROP<\/span> TABLE<\/span> <<\/span>Table<\/span> name<\/span>><\/span>;<\/span>
\n<\/code>\u6211\u5011\u8a66\u8457\u522a\u9664\u9019\u500bCustomer\u8868\u3002\u73fe\u5728\u7684\u8868\u683c\u5167\u5bb9\u5982\u4e0b\uff1ahoge<\/span>=#<\/span> \\<\/span>d<\/span>
\n         List<\/span> of<\/span> relations<\/span>
\n Schema<\/span> |<\/span>   Name<\/span>   |<\/span> Type<\/span>  |<\/span>    Owner<\/span>
\n--------+----------+-------+-------------<\/span>
\n public<\/span> |<\/span> customer<\/span> |<\/span> table<\/span> |<\/span> sf213471118<\/span>
\n(<\/span>1<\/span> row<\/span>)<\/span>
\n<\/code>\u5728\u8fd9\u4e2a\u72b6\u6001\u4e0b\u5220\u9664\u8868\u3002hoge<\/span>=#<\/span> DROP<\/span> TABLE<\/span> Customer<\/span>;<\/span>
\nDROP<\/span> TABLE<\/span>
\n<\/code>\u53ef\u4ee5\u5c1d\u8bd5\u786e\u8ba4\u662f\u5426\u5df2\u88ab\\d\u5220\u9664\u3002hoge=#<\/span> \\d<\/span>
\nDid not find any relations.
\n<\/span><\/code>\u80fd\u591f\u786e\u8ba4\u5df2\u7ecf\u5f7b\u5e95\u5220\u9664\u4e86\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
ID<\/th>\nname<\/th>\nage<\/th>\n<\/tr>\n<\/thead>\n
0002<\/td>\n\u4e2d\u6751\u82b1\u5b50<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n
ID<\/th>\nname<\/th>\nage<\/th>\n<\/tr>\n<\/thead>\n
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