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August 29, 2024Transactions
August 29, 2024Database-Management-System
| Question 523 |
The dependency preservation decomposition is a property to decompose database schema D, in which each functional dependency X → Y specified in F,
| appeared directly in one of the relation schemas Ri in the decomposed D. | |
| could be inferred from dependencies that appear in some Ri. | |
| both (A) and (B) | |
| None of these |
Question 523 Explanation:
The dependency preservation decomposition is a property to decompose database schema D, in which each functional dependency X → Y specified in F
Appeared directly in one of the relation schemas Ri in the decomposed D.
Could be inferred from dependencies that appear in some Ri.
Appeared directly in one of the relation schemas Ri in the decomposed D.
Could be inferred from dependencies that appear in some Ri.
Correct Answer: C
Question 523 Explanation:
The dependency preservation decomposition is a property to decompose database schema D, in which each functional dependency X → Y specified in F
Appeared directly in one of the relation schemas Ri in the decomposed D.
Could be inferred from dependencies that appear in some Ri.
Appeared directly in one of the relation schemas Ri in the decomposed D.
Could be inferred from dependencies that appear in some Ri.