A.刪除數據庫B.關閉所有用戶與該數據庫的連接C.添加勾選完整備份與當前事務日志備份之間的所有事務日志備份D.以上都不行
A.sp_dropdeviceB.sp_addumpdeviceC.sp_grantloginD.sp_addlogin
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