Select the correct answer______________ is the superset of all keys in a relation.OptionsSub keyCandidate keySuper keyForeign key
Question
Select the correct answer
______________ is the superset of all keys in a relation.
Options
- Sub key
- Candidate key
- Super key
- Foreign key
Solution
The correct answer is Super key.
Here's why:
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A super key is a set of one or more keys that can be used to identify a record uniquely in a relation.
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In other words, a super key is a set of attributes within a table that can uniquely identify each record within a table.
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Therefore, a super key is a superset of all keys in a relation.
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The other options, Sub key, Candidate key, and Foreign key, do not fit the definition of a superset of all keys in a relation.
So, the correct answer is Super key.
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