MySQL创建用户和授权

创建用户

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

username: 用户名字，host:是能从哪个IP地址访问，%为所有IP都能访问，password 为密码

例子：

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

授权

GRANT privileges ON databasename.tablename TO 'username'@'host'

说明: privileges - 用户的操作权限,如SELECT , INSERT , UPDATE 等(详细列表见该文最后面).如果要授予所的权限则使用ALL.;databasename - 数据库名,tablename-表名,如果要授予该用户对所有数据库和表的相应操作权限则可用表示, 如.*.

例子:

GRANT SELECT, INSERT ON test.user TO 'pig'@'%';

设置与更改用户密码

SET PASSWORD FOR 'username'@'host' = PASSWORD('newpassword');如果是当前登陆用户用SET PASSWORD = PASSWORD("newpassword"); 

例子:

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

撤销用户权限

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

例子:

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

删除用户

DROP USER 'username'@'host';