A.DELETEFROMXSFOR學(xué)號)=“0010” B.DELETEFROMXSFORRIGHT(學(xué)號,4)=“0010” C.DELETEFROMXSWHERE"0010"$學(xué)號 D.DELETEFROMXSWHERERIGHT(學(xué)號,4)=“0010”
A.SELECT*FROM職工WHERE年齡>=30AND年齡<=50 B.SELECT*FROM職工WHERE年齡>30AND年齡<50 C.SELECT*FROM職工WHERE年齡>=30OR年齡<=50 D.SELECT*FROM職工WHERE年齡>30OR年齡<50
A.級聯(lián)和忽略 B.級聯(lián)和刪除 C.級聯(lián)和限制 D.限制和忽略