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Microsoft SQL Server MCQs

Which of the following statements is/are wrong?

Both Primary key and Unique key enforce uniqueness

Primary keys create a clustered index by default

Both Primary key and Unique key don't allow NULL values

Unique keys create a non-clustered index by default

It is possible to have more than one Primary key in a table

Answer

Correct Answer: Both Primary key and Unique key don't allow NULL values

Explanation:

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