What happens when functional dependency is circular?
-
12-11-2019 - |
Pergunta
I am trying to decompose the following relationships in to 3NF:
A -> BCD
BC -> DE
C -> D
D -> A
So I eliminated the redundancy to get the canonical cover:
A -> BC
B -> E
C -> D
D -> A
And now I am trying to decompose this into 3NF.
Should I decompose into r1(A, B, C) r2(B, D), r3(C, D)
. Then what do I do with D -> A
?
The fact that A -> B -> D -> A
is throwing me off.
Nenhuma solução correta
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