Candidate key

Question

If A⁺ and BC⁺ both produces all the attributes of the relation then candidate key would be A? or both A and BC? 

Comments

Both !

Answer 1

You have to keep in mind that there can be more than one candidate key in a relation. It is the primary key that is one among those candidate keys.

So, as both A⁺ and BC⁺ both produces all the attributes of the relation then both of them are the candidate keys.

Answer 2

Both Will be Candidate key