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Question Practice

In a relational database, how is a primary key defined?

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MCQ_SA
CBSE
Class 12
Computer Science
Computer Science
Database Concepts
Question Bank

In a relational database, how ...

Single Answer MCQ
Q-00095144

In a relational database, how is a primary key defined?

1

An attribute that can have null values.

2

An attribute or a set of attributes that uniquely identify tuples.

3

A key used for foreign relations only.

4

An attribute that is never updated.

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