mysql关于访问权限以及root密码修改

root密码修改：

mysql> use mysql;

mysql> UPDATE user SET Password = PASSWORD('newpass') WHERE user = 'root';

mysql> FLUSH PRIVILEGES;

问题：Access denied for user 'root'@'192.168.46.161' to database 'db3'

mysql> grant all on db3.* to 'root'@'%' identified by '123456' with grant option;

musql> FLUSH PRIVILEGES;;