数据库新建用户并给予权限

创建一个新的用户username密码为password

CREATE USER username IDENTIFIED BY 'password';

查看所有的用户

select host,user from mysql.user;

给新建立的用户查询和插入的权限

GRANT SELECT, INSERT ON dbname.users TO 'username'@'%';

flush privileges;

查看所有用户的权限

show grants for 'username'@'%';

删除用户

DELETE FROM mysql.user WHERE user="username";
flush privileges;
select host,user from mysql.user;

撤回权限

evoke all on *.* from 'username'@'host';
flush privileges;
show grants for 'username'@'host';

给用户修改某一特定列权限

GRANT UPDATE(`column1`, `column2`) ON db.table TO 'username'@'%';
flush privileges;