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Which of the following constraint does not enforce uniqueness?

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+1 vote
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in SQL Server by (80.5k points)
Which of the following constraint does not enforce uniqueness?

(a) UNIQUE

(b) Primary key

(c) Foreign key

(d) None of the mentioned

This question was addressed to me in a national level competition.

My question comes from Constraints topic in section Manipulating Data with Select of SQL Server

1 Answer

+1 vote
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Best answer
Right answer is (c) Foreign key

To explain: FOREIGN KEY constraints identify and enforce the relationships between tables.

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