34.从订单表中删除客户号为“1001”的订单记录，正确的SQL语句是 (A)DROP FROM 订单 WHERE 客户号="1001" (B)DROP FROM 订单 FOR 客户号="1001" (C)DELETE FROM 订单 WHERE 客户号="1001" (D)DELETE FROM 订单 FOR 客户号="1001"

33.有以下SQL语句： SELECT 订单号,签订日期,金额 FROM 订单,职员 WHERE 订单.职员号=职员.职员号 AND 姓名="李二" 与如上语句功能相同的SQL语句是 (A)SELECT 订单号,签订日期,金额 FROM 订单 WHERE EXISTS (SELECT * FROM 职员 WHERE 姓名="李二") (B)SELECT 订单号,签订日期,金额 FROM 订单 WHERE EXISTS (SELECT * FROM 职员 WHERE 职员号=订单.职员号 AND 姓名="李二") (C)SELECT 订单号,签订日期,金额 FROM 订单 WHERE IN (SELECT 职员号 FROM 职员 WHERE 姓名="李二") (D)SELECT 订单号,签订日期,金额 FROM 订单 WHERE IN (SELECT 职员号 FROM 职员 WHERE 职员号=订单.职员号 AND 姓名="李二")

34.从订单表中删除客户号为“1001”的订单记录，正确的SQL语句是 (A)DROP FROM 订单 WHERE 客户号="1001" (B)DROP FROM 订单 FOR 客户号="1001" (C)DELETE FROM 订单 WHERE 客户号="1001" (D)DELETE FROM 订单 FOR 客户号="1001"

其他試題

34.从订单表中删除客户号为“1001”的订单记录，正确的SQL语句是
(A)DROP FROM 订单 WHERE 客户号="1001"
(B)DROP FROM 订单 FOR 客户号="1001"
(C)DELETE FROM 订单 WHERE 客户号="1001"
(D)DELETE FROM 订单 FOR 客户号="1001"