If r(p, q, r, s, t) is a relation. pq → r, pt → s, and s → q are the functional dependencies. identify the candidate key set for relation r
a.pq
b.pr
c.pt
d.ps
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the answer is a.pq in these options
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Answer:
Step-by-step explanation:
given r(p, q, r, s, t) is a relation.
pq → r
pt → s
s → q
in dependent side pt is missing, so pt is the candidate key of the given relation.
verify :
pt+ = p t s q r
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