A.grant delete on students to helloB.revoke delete on students to helloC.revoke delete on students from helloD.deny delete on students to hello
A.每個角色有一定的權(quán)限B.是服務器權(quán)限的集合C.不能創(chuàng)建服務器角色D.能創(chuàng)建服務器角色
A.CREATE USER user_name FOR LOGIN login_nameB.ALTER USER username WITH NAME=newusernameC.create login name with password=’abcd1234@’D.CREATE ROLE role_name AUTHORIZATION owner_name