MYSQL數據庫如何賦予遠程某個IP訪問權限

1. 授權用戶root使用密碼jb51從任意主機連接到 mysql服務器：
代碼如下:
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'jb51' WITH GRANT OPTION;
flush privileges;

2.授權用戶root使用密碼jb51從指定 ip為218.12.50.60的主機連接到 mysql服務器：
代碼如下:
GRANT ALL PRIVILEGES ON *.* TO 'root'@'218.12.50.60' IDENTIFIED BY 'jb51' WITH GRANT OPTION;
flush privileges;