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Consider a schema R(A, B, C, D) and functional dependencies A → B and C → D. Then the decomposition R1(A, B) and R2(C, D) is | |
A. | Lossless Join [Wrong Answer] |
B. | Dependency preserving and lossless join [Wrong Answer] |
C. | Lossless Join but not dependency preserving [Wrong Answer] |
D. | Dependency preserving but not lossless join [Correct Answer] |