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7 . ( a ) Consider the relation R ( A , B , C , D , E ) with the following functional dependencies:
a Consider the relation RA B C D E with the following functional dependencies:
A B AC CD E E D
Determine the closure of each functional dependency, find the candidate keys for R
and identify the highest normal form of R
b Given the relation RA B C D E F with the following functional dependencies:
AB C CD E BD E F
Identify all candidate keys, check for violations of the Second Normal Form NF
and Third Normal Form NF and suggest necessary decompositions.
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