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Postings from April 2002
April 30, 2002 15:23
Message ID: OFF5D1A470.66DD35BC-ON85256BAB.0079C615@frb.gov
I got this problem from a friend and was wondering if anyone could help
The following is a set of functional dependency for a relation R
(A,B,C,D,E,F) with A->D, BE->CDF, C->E, D->B
where A->D implies A determines D or D is functionally dependent on A.
1. Show with explanation that the functional dependency AC->F is implied by
2. Compute the closure(A,C) for the above set.
3. Is the set A,C a super key for the given relation R.
William Ampeh (x3939)
Federal Reserve Board