GATE | GATE-CS-2014-(Set-2) | Question 32

Given the STUDENTS relation as shown below.
For (StudentName, StudentAge) to be the key for this instance, the value X should not be equal to
(A) 18
(B) 19

Answer: (B)

Explanation: There is already an entry with same name and age as 19. So the age of this entry must be something other than 19.

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