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Database Management SystemConsider the relation R (P, Q, S, T, X, Y, Z, W) with the following functional dependencies. PQ → X; P → YX; Q → Y; Y → ZW Consider the decomposition of the relation R into the constituent relations according to the following two decomposition schemes. D1 : R = [(P, Q, S, T); (P, T, X); (Q, Y); (Y, Z, W)] D2 : R = [(P, Q, S); (T, X); (Q, Y); (Y, Z, W)] Identify whether it is a lossless or lossy decomposition and justify your answer.20247mDatabase Management SystemSuppose relation R(A,B,C) is decomposed into: R1(A,B) and R2(B,C). The decomposition is lossless if: (i) B \rightarrow A or B \rightarrow C (ii) A \rightarrow B (iii) A \rightarrow C (iv) C \rightarrow B20252mDatabase Management SystemWhat are multivalued and join dependencies in the database system? Explain with the help of example.20187mDatabase Management SystemWrite a short note on: Dependency Preservation and Lossless Decomposition20257m
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