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ISRO | ISRO CS 2014 | Question 22
Consider the schema R(A, B, C, D) and the functional dependencies A->B and C->D. If the decomposition is made as R1(A,B) and R2(C,D), then which of the following is TRUE?
(A)
Preserves dependency but cannot perform lossless join
(B)
Preserves dependency and performs lossless join
(C)
Does not perform dependency and cannot perform lossless join
(D)
Does not preserve dependency but perform lossless join
Answer
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