下列哪个关键字在SELECT 语句中表示不取重复行

A.DISTINCT

B.UNION

C.ALL

D.TOP

A.SELECT，INTO

B.SELECT，FROM

C.SELECT，GROUP

D.仅SELECT

A.SOME

B.EXISTS

C.ANY

D.ALL

A.Update

B.Delete

C.Select

D.Insert

A.update

B.insert

C.delete

D.select

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.SELECT year，director FROM Movie

B.SELECT mID，title FROM Movie

C.SELECT director，year FROM Movie

D.SELECT director，mID FROM Movie

A.drop table

B.select table

C.alter table

D.update table

A.DELETE

B.UPDATE

C.SELECT

D.INSERT