Question

What is the function of the unique constraint?
A
It ensures that no two values under an attribute are identical
o B It ensures that all the attributes are perfectly unique in their data type
It ensures that all the relations in the database have a unique set of attributes
o D It does not have any function in SOL​

Answer 1

Answer:

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Answer 2

Answer:

The correct answer of this question it ensures that no two values under an attribute are identical.

Explanation:

Given - The function of the unique constraint. A)It ensures that no two values under an attribute are identical

B) It ensures that all the attributes are perfectly unique in their data type

C) It ensures that all the relations in the database have a unique set of attributes

D) It does not have any function in SOL​.

The purpose of the unique clause is the ensure that no two values under the same attribute which are identical. Primary keys are unique by the default.