user:myuser pwd:mypassword 从任何主机连接到mysql服务器
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
user:myuser pwd:mypassword 从192.168.1.3连接到mysql服务器
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;