Question: Given a relational schema R with attributes A, B, C, and D, where functional dependencies B -> ACD and C -> D are supposed to

Given a relational schema R with attributes A, B, C, and D, where functional dependencies B -> ACD and C -> D are supposed to hold.

Given a relational schema R with attributes A, B, C, and

5. (18 points) Given a relational schema R with attributes A, B, C, and D, where functional dependencies B-> ACD and C->D are supposed to hold. (a) What are all the keys in ABCD? (b) Give example of a superkey in ABCD that is not a key. (c) Give example of a superkey in ABCD that is also a key. (d) Give example of a trivial functional dependency over ABCD

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