Question

Suppose if R(A, B, C, D, E) is a relation with functional dependencies AB → C and CD → E. A, B, D are the prime attributes of R. There can be at most 4 dierent values for each of the attributes A, B, and D. What is the maximum number of dierent values E can take?

Answer 1

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Answer 2

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Answer: Non-trivial functional dependencies: A -> B C -> B 2. Exrercise 7.6: Compute the closure of the following set F of functional dependencies for relation schema

R = {A, B, C, D, E}. A -> BC CD -> E B -> D E -> A

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