教甄◆資訊科技概論專業(電腦科)題庫下載題庫

49. Given the relation below

what values will be retrieved by the following SQL statement？ 

SELECT A, B FROM Y WHERE Y.B = Y.C
(A) 2, 5
(B) 3, 6
(C) 5, 2
(D) 2, 2