Discussion :: DBMS MCQs
- The subset of super key is a candidate key under what condition ?
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A.
No proper subset is a super key
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B.
All subsets are super keys
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C.
Subset is a super key
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D.
Each subset is a super key
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Answer : Option A
Explanation :
No proper subset is a super key
The subset of a set cannot be the same set.Candidate key is a set from a super key which cannot be the whole of the super set
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