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Which of the following is NOT a super key?

Which of the following is NOT a super key in a relational schema with attributes
V,W, X, Y, Z and primary key V Y?
(A) VXYZ
(B) VWXZ
(C) VWXY
(D) VWXYZ

5Comments
Pritam Prasun @pritam
20 Jun 2016 12:32 pm

Considering VY as primary key, any combination of attributes will be a super key containing VY.

Now you can find the answer. Right ?

shivanisrivarshini @shivanisrivarshini
20 Jun 2016 07:32 pm

Since VY is key any combination containing VY is super key By observing Option B didn't have Y so VWXZ is not super key

Mohit Lalwani @monty12
22 Jun 2016 12:38 pm

Pritam Prasun @pritam
22 Jun 2016 03:27 pm

Please prefer to type rather than uploading image.

Mohit Lalwani @monty12
22 Jun 2016 05:12 pm

ok sir.. .