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1.授权

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--授权app用户从指定IP访问数据库的所有权限

grant all privileges on *.* to 'app'@'10.200.12.232' identified by 'app1234';

--取消授权

revoke alter on *.* from 'app'@'10.200.12.232' identified by 'app1234';

?

--授权app用户从指定IP访问downloaddb数据库的表（增删改查）

GRANT select,insert,update,delete ON downloaddb.* TO 'app'@'10.200.12.199' IDENTIFIED BY 'app1234' WITH GRANT OPTION;

--取消授权

revoke select,insert,update,delete ON downloaddb.* from 'app'@'10.200.12.199' IDENTIFIED BY 'app1234';

2.刷新权限

--刷新权限

FLUSH PRIVILEGES;