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Consider a relation R ( A , B , C , D ) and the functional dependencies that hold over R: ABC - > D

Consider a relation R(A,B,C,D) and the functional dependencies that hold over R:
ABC->D D->A
1- Consider the decomposition of R into R1(A,B,C) and R2(B,C,D). Could this
decomposition have been the result of applying the BCNF decomposition algorithm to
R?
2- Is R1 and R2 a lossless decomposition?

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