Question: R ( A , B , C , D , E ) : MVDs: A B , A B C , F D s :

R(A,B,C,D,E): MVDs: AB,ABC,FDs:AD,ABE
All 4NF violations?
Keys(s):ABC is always part of it. As ABC+=ABCDE,ABC is the only k as the FDs promoted as MVDs violate 4NF.
Decompose into 4NF as necessary?
R(A,B,C,D,E): MVDs: AB,ABC,FDs:AD,ABE All 4NF violations? Keys(s):ABC is always part of

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