在没有工具的时候怎样用命令创建mysql用户和把用户授权给对应的数据库.

>create database db_name;

>create user ‘user_name'@'localhost’ identified by ‘password’;

>grant all privileges on db_name.* to ‘user_name’@’localhost’;

>flush privileges;

>exit;

删除用户和数据库:

>drop user user_name@localhost;                                       

>delete database db_name;