这里可以请教这种考试题么。。。
The following set F of functional dependencies is for relation schema R = ( A, B, C, D, E ): A -> C, C -> A, B -> AC, D -> AC.
(1) Give a lossless-join, dependency-preserving decomposition into 3NF of R.
(2) Give a lossless-join decomposition into BCNF of R.