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Which of the following is a trivial functional dependency?
8. Which of the following is a trivial functional dependency?
- A->B, if B is a subset of A
- A->A
- B->B
- All of the above
Answer: A) A->B, if B is a subset of A
Explanation:
These are the trivial functional dependencies -
- A->B
- A->A
- B->B