A ______ of a relation is a set of one or more attributes whose values are…
2020
A ______ of a relation is a set of one or more attributes whose values are guaranteed to identify tuples in the relation uniquely.
Answer: B. super key — A super key is any set of one or more attributes whose values uniquely identify each tuple in a relation. A candidate key is only a minimal super key, and a…
- A.
foreign key
- B.
super key
- C.
key
- D.
scheme
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Correct answer: B
A super key is any set of one or more attributes whose values uniquely identify each tuple in a relation. A candidate key is only a minimal super key, and a primary key is a chosen candidate key. Since the question does not require minimality, the correct term is super key. Therefore, Option B is correct.
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