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1-Consider a relation R(A,B,C,D,E) with the following functional dependencies: AB CD E E A B D Specify all minimal keys for R. 2-Consider a relation
1-Consider a relation R(A,B,C,D,E) with the following functional dependencies:
AB
CD E
E A
B D
Specify all minimal keys for R.
2-Consider a relation R(A,B,C,D,E,F,G,H) with the following functional dependencies:
A BCD
AD E
EFG H
F GH
Based on these functional dependencies, there is one minimal key for R. What is it?
3-Consider relation R=(A,B,C,D) with the following FDs:
AB C
CD
DA
List all candidate keys of R.
4-Consider relation S=(A,B,C,D) with the following FDs:
AB
BC
CD
DA
List all candidate keys of S.
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