Suppose relation R(A,B,C,D,E) has the following functional dependencies:A -> BB -> CBC -> AA -> DE -> AD -> EWhich of the following is not a key?B, CAED

Question

Suppose relation R(A,B,C,D,E) has the following functional dependencies:A -> BB -> CBC -> AA -> DE -> AD -> EWhich of the following is not a key?B, CAED
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Solution 1

To determine which of the following is not a key, we need to find the closure of each set of attributes and see if it includes all attributes in the relation.

  1. For B, C: The closure of B, C is {B, C, A}. It does not include all attributes in the relation R(A,B,C,D,E). So, B, C is not a key.

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Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study problem.
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