37. Consider the following tables, A and B, in a relational database:
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 Which of the following SQL statement can be used to concatenate A and B?
(A) SELECT * FROM A UNION ALL SELECT * FROM B
(B) SELECT * FROM A FULL OUTER JOIN B ON A.id = B.id
(C) SELECT * FROM A INNER JOIN B ON A.id = B.id
(D)SELECT * FROM A LEFT JOIN B ON A.id = B.id

答案：登入後查看
統計： A(0), B(4), C(2), D(0), E(0) #2847400