OD
(Choose 1 answer)
A. SELECT A, B FROM R
The relation R(A,B) may have duplicate tuples. Choose the query that create non-duplicated results, regardless of what tuples R contains?
B. SELECT A, B FROM R GROUP BY A, B
C. SELECT A FROM R WHERE A NOT IN (SELECT B FROM R)
D. SELECT TOP 3 A, B FROM R
Exit 14
