Mysql之数据库用户操作

查看用户：

select host,user from mysql.user;　　//mysql库中user表，host为主机地址，user为用户名

mysql> select host,user from mysql.user;
+-----------+------+
| host      | user |
+-----------+------+
| 127.0.0.1 | root |
| ::1       | root |
| localhost | root |
+-----------+------+
3 rows in set (0.00 sec)

创建用户：

create user 'test1'@'%' identified by 'test1';　　//%为通配符，表示所有IP都有连接权限（192.168.1.%限制网段访问）

mysql> create user 'test1'@'%' identified by 'test1';
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user from mysql.user;
+-----------+-------+
| host      | user  |
+-----------+-------+
| %         | test1 |
| 127.0.0.1 | root  |
| ::1       | root  |
| localhost | root  |
+-----------+-------+
4 rows in set (0.00 sec)

修改用户密码：

set password for root=password('123456');　　//修改root账号密码

mysql> set password for test1=password('');
Query OK, 0 rows affected (0.00 sec)

删除用户：

drop user testuser;

mysql> drop user testuser;
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user from mysql.user;
+-----------+------+
| host      | user |
+-----------+------+
| 127.0.0.1 | root |
| ::1       | root |
| localhost | root |
+-----------+------+
3 rows in set (0.00 sec)