授权任意主机连接：

账号myuser密码password任何主机连接到mysql服务器
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;

指定IP连接：

允许用户myuser从IP为192.168.1.3的主机连接到mysql服务器，并使用password作为密码
GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.3' IDENTIFIED BY 'password' WITH GRANT OPTION;