MySql更改用户密码

有好几种方法：

1. 命令行更改：
mysqladmin password 新密码
例如， dos(或者liunx)下mysql的bin目录下,mysqladmin password 123456

2. 用MYSQL的grant语句，例如
GRANT ALL ON *.* TO 'root'@'localhost' IDENTIFIED BY '123456' WITH GRANT OPTION

3. SET PASSWORD FOR '用户名'@'主机' = PASSWORD('密码')
例如设置root密码为123456，SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');

4. UPDATE user SET Password=PASSWORD('新密码') WHERE User='用户名' AND Host = '主机';

例如，UPDATE user SET Password=PASSWORD('123456') WHERE User='root' AND Host = 'localhost';flush priviliges;