问题详情

Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 1 4 1 3 1 2 Table T2: C1 C2 1 1 1 2 1 3 Which of the following queries will return only those rows that exist in both T1 and T2?（）

A、SELECT * FROM t1 UNION SELECT * FROM t2

B、SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2

C、SELECT * FROM t1 INTERSECT SELECT * FROM t2

D、SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)

时间：2022-01-03 00:31 关键词： IBM(000-730)

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