mysql –u root mysql>update user set password=PASSWORD(‘123456‘) where user=‘root‘;
mysql -u root –p mysql>use mysql; mysql>update user set host = ‘%‘ where user = ‘root‘; mysql>select host, user from user;
使用root帐号和root的原始密码可以在任何主机登录
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘123456‘ WITH GRANT OPTION; flush privileges;
授权用户root使用密码123456从任意主机连接到mysql服务器
GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘218.12.50.60‘ IDENTIFIED BY ‘mark‘ WITH GRANT OPTION; flush privileges;
授权用户root使用密码mark从指定ip为218.12.50.60的主机连接到mysql服务器：
授权表达式：
grant 权限 on 数据库对象 to 用户
数据对象为 *.*：对mysql服务器中所有的数据库和表进行授权
数据对象为dbname.*：对mysql服务器中单个数据库dbname下的所有表进行授权
数据对象为dbname.user：对mysql服务器中单个数据库dbname下的user表进行授权
解除授权表达式
revoke 权限 on 数据库对象 from 用户
数据对象的界定与上面相同
mysql权限表达式
授权普通用户对数据库testdb的所有表CRUD的权限： grant select on testdb.* ‘general_user‘@‘%‘ grant insert on testdb.* to ‘general_user‘@‘%‘ grant update on testdb.* to ‘general_user‘@‘%‘ grant delete on testdb.* to ‘general_user‘@‘%‘ grant select(id,name,birth) on testdb.* ‘general_user‘@‘%‘ 可以直接使用： grant select, insert, update, delete on testdb.* to ‘general_user‘@‘%‘ 授权数据库开发人员权限： grant create on testdb.* to developer@‘192.168.0.%‘; grant alter on testdb.* to developer@‘192.168.0.%‘; grant drop on testdb.* to developer@‘192.168.0.%‘; grant references on testdb.* to developer@‘192.168.0.%‘; grant create temporary tables on testdb.* to developer@‘192.168.0.%‘; grant index on testdb.* to developer@‘192.168.0.%‘; grant create view on testdb.* to developer@‘192.168.0.%‘; grant show view on testdb.* to developer@‘192.168.0.%‘; grant create routine on testdb.* to developer@‘192.168.0.%‘; grant alter routine on testdb.* to developer@‘192.168.0.%‘; grant execute on testdb.* to developer@‘192.168.0.%‘; grant all privileges on testdb to dba@‘localhost‘
原文：http://www.cnblogs.com/makexu/p/6228686.html