mysql创建用户以及授权

Posted 2021-01-10 1874

首先登录数据库

[[email protected] ~]# mysql -uroot -p
Enter password: 

第一种方式使用grant直接创建和授予权限:

mysql>grant all privileges on qiuhom.* to [email protected] identified by ‘admin123.com‘;

以上语句表示创建一个qiuhom_db1的用户并且给予用户qiuhom库下的所有表的权限，并设置密码为admin123.com
我们可以通过show grants for [email protected];来查看用户的权限

mysql> show grants for [email protected];
+-------------------------------------------------------------------------------------------------------------------+
| Grants for [email protected] |
+-------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO ‘qiuhom_db1‘@‘localhost‘ IDENTIFIED BY PASSWORD ‘*2D9AC2437F9E59A51BE8BA89A3D59E76F32F55E8‘ |
| GRANT ALL PRIVILEGES ON `qiuhom`.* TO ‘qiuhom_db1‘@‘localhost‘ |
+-------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)　

第二种方式是先创建用户然后在授权

mysql>create user [email protected] identified by ‘admin123.com‘; 　　　　####创建[email protected]用户，并设置密码为admin123.com 

mysql>grant all on qiuhom.* to qi[email protected]; 　　　　　　　　　　　　　####给[email protected]授权

查看权限

mysql> show grants for [email protected];
+-------------------------------------------------------------------------------------------------------------------+
| Grants for [email protected]                                                                                   |
+-------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO ‘qiuhom_db2‘@‘localhost‘ IDENTIFIED BY PASSWORD ‘*2D9AC2437F9E59A51BE8BA89A3D59E76F32F55E8‘ |
| GRANT ALL PRIVILEGES ON `qiuhom`.* TO ‘qiuhom_db2‘@‘localhost‘                                                    |
+-------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)

　　

提示：以上两种方式都是mysql数据库创建用户和授权用户的权限，需要注意的是第二种方式授权后面不需要有密码，创建好用户后不授权是可以
登录的，只是登录后不能操作任何数据库包括查看都没有。