In a relational database model, cardinality of a relation means:

2017

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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