mysql受权用户，撤销用户，撤销权限基本操做

进入mysql库

use mysql; mysql> select host,user from user; +-----------+---------------+
| host      | user          |
+-----------+---------------+
| %         | root          |
| localhost | mysql.session |
| localhost | mysql.sys     |
| localhost | root          |
+-----------+---------------+
4 rows in set (0.00 sec) select host,user from user where user='root';

将相应用户数据表中的host字段改为'%'；

update user set host='%' where user='root'; update user set host='localhost' where user='root' and host='192.168.%.%'; //ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY' 不予理会
flush privileges

受权用户

grant all privileges on *.* to 'root'@'172.18.%.%' identified by '123456' with grant option; grant all privileges on *.* to 'root'@'192.168.1.%' identified by '123456' with grant option;

撤销权限

revoke all privileges on *.* from root@'%'; revoke all privileges on db01.* from root@'%';

删除用户

drop user 'test'@'localhost';

查看用户的受权

mysql> SHOW GRANTS FOR 'user01'@'%'; +--------------------------------------------------------+
| Grants for user01@%                                 |
+--------------------------------------------------------+
| GRANT USAGE ON *.* TO 'root'@'%'                  |
| GRANT ALL PRIVILEGES ON `db01`.* TO 'user01'@'%' |
+--------------------------------------------------------+
2 rows in set (0.00 sec) //USAGE:create user时的默认的空权限，只能连库，因此user01如今的权限是在mysql01数据库上有全部的权限。