Mysql中的用户 user 每一个user都对应了不同的用户地址和权限

创建Mysql用户共有三种方式1、create user 2、grant 3、操作mysql.user表

1、CREATE USER 'username'@'host' IDENTIFIED BY 'password';

例子: CREATE USER 'aa'@'localhost' IDENTIFIED BY '123456';

CREATE USER 'aa'@'192.168.1.101_' IDENDIFIED BY '123456';

CREATE USER 'aa'@'%' IDENTIFIED BY '123456';

CREATE USER 'bb'@'%' IDENTIFIED BY '';

CREATE USER 'cc'@'%';

用户有两个部分组成 格式:名字@主机

[email protected] 本机发起链接的aa用户

客户端地址为152.236.20.10的用户bb

[email protected]% %通配符,表示所有

2、使用grant语句(授权方式)

语法:mysql> grant 权限1,权限2,...权限n on 名称.表名称 to 用户名@用户地址 identified by '连接口令';

权限1,权限2,...权限n代表

select,insert,update,delete,create,drop,index,alter,grant,references,reload,shutdown,process,file等14个权限

实例:

>grant select,insert,update,delete,create,drop on vtdc.employee to identified by '123';

给来自10.163.225.87的用户joe分配可对数据库vtdc的employee表进行select,insert,update,delete,create,drop等操作的权限,并设定口令为123。

mysql>grant all privileges on vtdc.* to identified by '123';

给来自10.163.225.87的用户joe分配可对数据库vtdc所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to identified by '123';

给来自10.163.225.87的用户joe分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

mysql>grant all privileges on *.* to [email protected] identified by '123';

给本机用户joe分配可对所有数据库的所有表进行所有操作的权限,并设定口令为123。

3、直接向mysql.user表插入记录:

mysql> insert into user (host,user,password) values ('%','jss_insert',password('jss'));

mysql>flush privileges; //刷新权限表

修改用户密码:1、mysqladmin 2、修改mysql.user表 3、set password

1、 使用mysqladmin语法:mysqladmin -u用户名 -p旧密码 password 新密码

例如:mysqladmin -u root -p 123 password 456;

2、 直接修改user表的用户口令:

语法:update mysql.user set password=password('新密码') where User="phplamp" and Host="localhost";

实例:update user set password=password('54netseek') where user='root';

flush privileges;

3、使用SET PASSWORD语句修改密码:语法:

SET PASSWORD FOR 'username'@'host' = PASSWORD('newpassword');

如果是当前登陆用户用SET PASSWORD = PASSWORD("newpassword");

实例:

set password for [email protected]=password('');

SET PASSWORD FOR name=PASSWORD('new password');

SET PASSWORD FOR 'pig'@'%' = PASSWORD("123456");



删除用户和撤销权限:1、drop user 2、取消授权用户 3、删除mysql.user表中的记录

1、 取消一个账户和其权限

Drop USER user;

drop user [email protected]'%'

drop user [email protected]

2、 取消授权用户:

语法:REVOKE privilege ON databasename.tablename FROM 'username'@'host';

例子: REVOKE SELECT ON *.* FROM 'pig'@'%';

REVOKE SELECT ON test.user FROM 'pig'@'%';

revoke all on *.* from [email protected] ;

revoke all on user.* from 'admin'@'%';

SHOW GRANTS FOR 'pig'@'%'; //查看授权

3、删除用户:

语法: Delete from user where user = "user_name" and host = "host_name" ;

例子:delete from user where user='sss' and host='localhost';

参考博文:http://blog.csdn.net/leili0806/article/details/8573636