sql 用户相关命令

• 查看所有用户

select distinct concat(user, '@', host,';') as userList from mysql.user;

select  #查找

distinct  #去重复

concat  #拼接字符串

as  #换个别名

• 查看当前登陆的是哪个用户

select user();

• 添加一个新用户

create user 'username'@'host' identified by 'passwd';

identified by #由...鉴别，这里是给这个用户添加个密码

• 给用户修改密码

set password for 'username'@'host' = password("123456");

• 删除用户

drop user 'username'@'host';

• 查看具体某个用户的权限

show grants for 'username'@'host';

• 给用户username的数据库databasename中的表tablename授select和insert权。

grant select, insert on databasename.tablename to 'username'@'host'

• 给username用户所有表授所有权

grant all on *.* to 'username'@'host';

• 撤销权限

revoke select on databasename.tablename from 'username'@'host';