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IS
Question Practice

What is a primary key in SQL?

Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.

MCQ_SA
CBSE
Class 11
Informatics Practices
Informatics Practices
Introduction to Structured Que...
Question Bank

What is a primary key in SQL?

Single Answer MCQ
Q-00067027

What is a primary key in SQL?

1

A field that cannot be NULL

2

A unique identifier for records

3

A type of constraint

4

All of the above

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