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SQ
Question Practice

If a PRIMARY KEY is defined on a column, which of the following is true?

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MCQ_SA
CBSE
Class 12
Computer Science
Computer Science
Structured Query Language (SQL
Question Bank

If a PRIMARY KEY is defined on...

Single Answer MCQ
Q-00095207

If a PRIMARY KEY is defined on a column, which of the following is true?

1

The column can contain NULL values.

2

The column can contain duplicate values.

3

The column must contain unique values.

4

The column cannot be modified.

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