{"id":255,"date":"2019-01-09T00:00:50","date_gmt":"2019-01-08T16:00:50","guid":{"rendered":"http:\/\/qssjx.com\/?p=255"},"modified":"2019-07-23T13:35:04","modified_gmt":"2019-07-23T05:35:04","slug":"d5756ea597","status":"publish","type":"post","link":"https:\/\/qssjx.com\/?p=255","title":{"rendered":"mysql\u5e38\u7528\u64cd\u4f5c"},"content":{"rendered":"
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\u521d\u59cb\u4fe1\u606f<\/h2>\n

mysql\u9ed8\u8ba4\u7684\u7aef\u53e3\u53f7\u7801\u662f3306\uff0c\u670d\u52a1\u5668\u662f\u672c\u5730localhost
\n\u67e5\u770bmysql\u7248\u672c<\/p>\n

SELECT VERSION();\r\n+------------+\r\n| VERSION()  |<\/span>\r\n+------------+\r\n| 5.7.17-log |<\/span>\r\n+------------+\r\n1<\/span> row in<\/span> set (0<\/span>.01<\/span> sec)<\/code><\/pre>\n
\u5e38\u7528\u89c4\u8303<\/h2>\n
\u5173\u952e\u5b57\u51fd\u6570\u540d\u4e00\u5f8b\u4f7f\u7528\u5927\u5199\uff08\u4f46\u4f7f\u7528\u5c0f\u5199\u4e0d\u4f1a\u62a5\u9519\uff09
\n\u6570\u636e\u5e93\u540d\uff0c\u53d8\u91cf\u540d\u4f7f\u7528\u5c0f\u5199
\n\u672b\u5c3e\u8981\u52a0\u5206\u53f7<\/p>\n
\u6570\u636e\u5e93<\/h2>\n
\u6570\u636e\u5e93\u5e7f\u4e49\u4e0a\u8bf4\u5e94\u8be5\u662f\u4e00\u4e2a\u6846\u67b6\uff0c\u6211\u4eec\u9488\u5bf9\u8fd9\u4e2a\u6846\u67b6\u521b\u9020\u5b83\u6240\u5305\u542b\u7684\u6570\u636e\u5e93\u6587\u4ef6\u3002<\/p>\n
\u521b\u5efa\u6570\u636e\u5e93<\/h3>\n
CREATE DATABASE [IF NOT EXSITS] database_name
\n[CHARACTER SET character_set]<\/p><\/blockquote>\n
\u5176\u4e2d\u7559\u610f[]\u91cc\u9762\u7684\u5185\u5bb9\uff0c\u8fd9\u90e8\u5206\u7684\u5185\u5bb9\u4e3a\u53ef\u9009\u9879\u3002\u5982\u679c\u4f7f\u7528\u4e86\u4e2d\u62ec\u53f7\u7684\u5173\u952e\u5b57\uff0c\u8868\u793a\u5982\u679c\u521b\u5efa\u7684\u6570\u636e\u5e93\u548c\u4e4b\u524d\u7684\u6570\u636e\u5e93\u540c\u540d\uff0c\u90a3\u4e48\u4e0d\u4f1a\u62a5\u9519\uff0c\u6570\u636e\u5e93\u4f1a\u5c06\u8fd9\u4e2a\u9519\u8bef\u5f52\u7c7b\u5230warnings\u4e2d\uff0c\u6bd4\u5982\u6211\u521b\u5efa\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u6570\u636ebooks<\/p>\n
root@localhost (none)CREATE DATABASE BOOKS;\r\nQuery OK, 1<\/span> row affected (0<\/span>.01<\/span> sec)\r\n\r\nroot@localhost (none)CREATE DATABASE IF NOT EXISTS books;\r\nQuery OK, 1<\/span> row affected, 1<\/span> warning (0<\/span>.00<\/span> sec)\r\n\r\nroot@localhost (none)SHOW WARNINGS ;\r\n+-------+------+------------------------------------------------+\r\n| Level |<\/span> Code | Message                                        |<\/span>\r\n+-------+------+------------------------------------------------+\r\n| Note  |<\/span> 1007<\/span> | Can't create database 'books'; database exists |<\/span>\r\n+-------+------+------------------------------------------------+<\/code><\/pre>\n
\u6570\u636e\u5e93\u7f16\u7801<\/h3>\n
\u6570\u636e\u5e93\u7684\u7f16\u7801\u53ef\u4ee5\u5728\u521b\u5efa\u65f6\uff0c\u901a\u8fc7\u7b2c\u4e8c\u4e2a\u65b9\u62ec\u53f7\u4e2d\u7684\u5185\u5bb9\u6765\u6307\u5b9a\uff0c\u540c\u65f6\u4e5f\u6709\u5bf9\u5e94\u7684\u547d\u4ee4\u53ef\u4ee5\u68c0\u6d4b\u5df2\u7ecf\u521b\u5efa\u597d\u7684\u6570\u636e\u5e93\u7684\u7f16\u7801<\/p>\n
root@localhost (none)CREATE DATABASE t2 CHARACTER SET gbk;\r\nQuery OK, 1<\/span> row affected (0<\/span>.01<\/span> sec)\r\n\r\nroot@localhost (none)SHOW CREATE DATABASE t2;\r\n+----------+------------------------------------------------------------+\r\n| Database |<\/span> Create Database                                            |\r\n+----------+------------------------------------------------------------+\r\n|<\/span> t2       | CREATE DATABASE `t2` \/*!40100 DEFAULT CHARACTER SET gbk *\/ |<\/span>\r\n+----------+------------------------------------------------------------+\r\n1<\/span> row in<\/span> set (0<\/span>.00<\/span> sec)<\/code><\/pre>\n
\u5982\u679c\u9700\u8981\u4fee\u6539\u5df2\u7ecf\u521b\u5efa\u597d\u7684\u6570\u636e\u5e93\u7684\u7f16\u7801\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER\u547d\u4ee4\uff0c\u8fd9\u4e2a\u547d\u4ee4\u7684\u8bed\u6cd5\u7ed3\u6784\u4e0eCREATE DATABASE\u975e\u5e38\u76f8\u4f3c\u3002<\/p>\n
root<\/span>@localhost<\/span> (none)ALTER DATABASE t2 CHARACTER SET = utf8;\r\nQuery<\/span> OK<\/span>, 1 row<\/span> affected<\/span> (0.00<\/span> sec<\/span>)<\/code><\/pre>\n
\u4fee\u6539\u4e4b\u540e\u7ee7\u7eed\u67e5\u770b\u7ed3\u679c<\/p>\n
root@localhost (none)SHOW CREATE DATABASE t2;\r\n+----------+-------------------------------------------------------------+\r\n| Database |<\/span> Create Database                                             |\r\n+----------+-------------------------------------------------------------+\r\n|<\/span> t2       | CREATE DATABASE `t2` \/*!40100 DEFAULT CHARACTER SET utf8 *\/ |<\/span>\r\n+----------+-------------------------------------------------------------+\r\n1<\/span> row in<\/span> set (0<\/span>.00<\/span> sec)<\/code><\/pre>\n
\u67e5\u770b\u5df2\u6709\u6570\u636e\u5e93<\/h3>\n
\u4f7f\u7528\u4e0b\u9762\u7684\u547d\u4ee4\uff0c\u4f1a\u663e\u793a\u51fa\u76ee\u524d\u6240\u6709\u7684\u6570\u636e\u5e93<\/p>\n
 root@localhost (none)SHOW DATABASES;\r\n+--------------------+\r\n| Database           |<\/span>\r\n+--------------------+\r\n| information_schema |<\/span>\r\n| books              |<\/span>\r\n| performance_schema |<\/span>\r\n| sys                |<\/span>\r\n+--------------------+<\/code><\/pre>\n
\u6570\u636e\u8868<\/h2>\n
\u4e00\u4e2a\u6570\u636e\u5e93\u4e2d\u53ef\u4ee5\u6709\u591a\u4e2a\u6570\u636e\u8868\uff0c\u6570\u636e\u8868\u7ecf\u5e38\u53ef\u4ee5\u4f7f\u7528query\u7b49\u7b49\u5b57\u4e32\u6765\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n
\u521b\u5efa\u6570\u636e\u8868<\/h3>\n
\u6211\u60f3\u5728\u6570\u636e\u5e93test\u4e0b\u9762\u521b\u5efa\u4e86\u4e00\u5f20\u6570\u636e\u8868\uff0c\u9996\u5148\u9700\u8981\u6253\u5f00\u4e00\u4e2a\u6570\u636e\u5e93\uff0c\u4f7f\u7528USE\u547d\u4ee4\uff0c\u4e4b\u540e\u4f7f\u7528\u51fd\u6570\u67e5\u770b\u5f53\u524d\u5728\u4f7f\u7528\u7684\u6570\u636e\u5e93\uff0c\u786e\u8ba4\u65e0\u8bef\u3002<\/p>\n
mysql> USE test<\/span>;\r\nDatabase changed\r\nmysql> SELECT DATABASE();\r\n+------------+\r\n| DATABASE() |\r\n+------------+\r\n| test<\/span>       |\r\n+------------+\r\n1 row in<\/span> set<\/span> (0.00 sec)<\/code><\/pre>\n
\u73b0\u5728\u5f00\u59cb\u521b\u5efa\u4e00\u5f20\u6570\u636e\u8868\uff0c\u521b\u5efa\u6570\u636e\u5e93\u4f7f\u7528\u7684\u662f CREATE DATABASE\uff0c\u76f8\u5e94\u7684\u521b\u5efa\u6570\u636e\u8868\u4f7f\u7528\u76f8\u4f3c\u7684\u8bed\u6cd5<\/p>\n
CREATE TABLE table_name(
\n)<\/p><\/blockquote>\n
\u62ec\u53f7\u4e2d\u586b\u5199\u7684\u5185\u5bb9\u4e3a\u9700\u8981\u5b58\u50a8\u7684\u952e\u503c\u5bf9\uff0c\u4ee5\u53ca\u63a7\u5236\u4fe1\u606f\uff0c\u73b0\u5728\u662f\u4f8b\u5b50<\/p>\n
mysql> CREATE TABLE tb1<\/span>(\r\n    -> username VARCHAR(20<\/span>)<\/span>,\r\n    -> age TINYINT UNSIGNED,\r\n    -> salary FLOAT<\/span>(8<\/span>,2<\/span>)<\/span> UNSIGNED\r\n    -> )<\/span>;\r\nQuery OK, 0<\/span> rows affected<\/span> (0.07<\/span> sec)<\/span><\/span><\/code><\/pre>\n
\u8fd9\u91cc\u5728\u6570\u636e\u8868tb1\u4e2d\u521b\u5efa\u53d8\u957f\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\u53d8\u91cfusername\uff0c\u521b\u5efaTINYINT \u65e0\u7b26\u53f7\u7c7b\u578b\u7684\u53d8\u91cfage\uff0c\u4e4b\u540e\u521b\u5efa\u65e0\u7b26\u53f7\u6d6e\u70b9\u7c7b\u578b\u7684\u53d8\u91cfsalary\u3002\u8fd9\u91cc\u7684TINYINT \u63071\u4e2abyte\uff088bit\uff09\u8db3\u591f\u5b58\u50a8\u5e74\u9f84\u4e86\uff0cFLOAT(8,2) UNSIGNED \u6307\u4e00\u4e2a\u5c0f\u6570\uff0c\u5b83\u7684\u5c0f\u6570\u70b9\u5de6\u4fa7\u4e3a8\u4f4d\uff0c\u6709\u4e2a\u4e24\u4f4d\u3002<\/p>\n
\u521b\u5efa\u6210\u529f\u4e4b\u540e\uff0c\u67e5\u770b\u4e00\u4e0b\u6570\u636e\u8868\uff0c\u8fd9\u4e2a\u51fd\u6570\u548cSHOW DATABASE\u51fd\u6570\u7c7b\u4f3c\uff1a<\/p>\n
mysql> SHOW TABLES;\r\n+----------------+\r\n| Tables_in_test |<\/span>\r\n+----------------+\r\n| tb1            |<\/span>\r\n+----------------+\r\n1<\/span> row in<\/span> set (0<\/span>.00<\/span> sec)<\/code><\/pre>\n
\u5982\u679c\u60f3\u8981\u518d\u786e\u8ba4\u4e00\u4e0b\u6570\u636e\u8868\u7684\u7ed3\u6784\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u64cd\u4f5c\uff1a<\/p>\n
mysql> SHOW COLUMNS FROM tb1;\r\n+----------+---------------------+------+-----+---------+-------+\r\n| Field    |<\/span> Type                | Null |<\/span> Key | Default |<\/span> Extra |\r\n+----------+---------------------+------+-----+---------+-------+\r\n|<\/span> username | varchar(20)         |<\/span> YES  |     |<\/span> NULL    |       |<\/span>\r\n| age      |<\/span> tinyint(3<\/span>) unsigned | YES  |<\/span>     | NULL    |<\/span>       |\r\n|<\/span> salary   | float(8,2) unsigned |<\/span> YES  |     |<\/span> NULL    |       |<\/span>\r\n+----------+---------------------+------+-----+---------+-------+\r\n3<\/span> rows in<\/span> set (0<\/span>.02<\/span> sec)<\/code><\/pre>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u521d\u59cb\u4fe1\u606f mysql\u9ed8\u8ba4\u7684\u7aef\u53e3\u53f7\u7801\u662f3306\uff0c\u670d\u52a1\u5668\u662f\u672c\u5730localhost \u67e5\u770bmysql\u7248\u672c SELECT […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/posts\/255"}],"collection":[{"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qssjx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=255"}],"version-history":[{"count":3,"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/posts\/255\/revisions"}],"predecessor-version":[{"id":258,"href":"https:\/\/qssjx.com\/index.php?rest_route=\/wp\/v2\/posts\/255\/revisions\/258"}],"wp:attachment":[{"href":"https:\/\/qssjx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qssjx.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qssjx.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}