40. Given the relation below
  what values will be retrieved by the following SQL statement?
SELECT A, B FROM X WHERE X.B = x.C
(A) 2,2
(B) 2,5
(C) 3,3
(D) 3.6
(E) 6.2


答案：登入後查看
統計： A(1), B(0), C(0), D(0), E(6) #3081370