In a relational database model, cardinality of a relation means:
2017
In a relational database model, cardinality of a relation means:
Answer: B. the number of tuples — Cardinality of a relation refers to the number of tuples (rows) present in the relation. Attributes represent degree, not cardinality.
- A.
the number of constraints
- B.
the number of tuples
- C.
the number of attributes
- D.
the number of tables
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Correct answer: B
Cardinality of a relation refers to the number of tuples (rows) present in the relation.
Attributes represent degree, not cardinality.
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