SQL语言的GRANT和REVOKE语句主要是用来维护数据库的_________

A.CREATE TABLE

B.ROLLBACK

C.GRANT和REVOKE

D.COMMIT.

A.GRANT

B.CREATE

C.REVOKE

D.SELECT

A.GRANT

B.CREATE

C.REVOKE

D.SELECT

A.GRANT

B.SET

C.REVOKE

D.FROM

A.GRANT SELECT on Orders from user1

B.REVOKE SELECT on Orders from user1

C.GRANT SELECT on Orders to user1

D.REVOKE SELECT on Orders to user1

A.GRANT GRADE ON SC TO ZHAO

B.GRANT UPDATE ON SC TO ZHAO

C.GRANT UPDATE (GRADE) ON SC TO ZHAO

D.GRANT UPDATE ON SC (GRADE) TO ZHAO

A.GRANT GRADE ON SC TO Kate

B.GRANT UPDATE ON SC TO Kate

C.GRANT UPDATE (GRADE) ON SC TO Kate

D.GRANT UPDATE ON SC (GRADE) TO Kate

A.GRANT GRADE ON SC TO ZHAO

B.GRANT UPDATE ON SC TO ZHAO

C.GRANT UPDATE ON SC (GRADE) TO ZHAO

D.GRANT UPDATE (GRADE) ON SC TO ZHAO

A.GRANT GRADE ON SC TO Kate

B.GRANT UPDATE ON SC TO Kate

C.GRANT UPDATE (GRADE) ON SC TO Kate

D.GRANT UPDATE ON SC (GRADE) TO Kate