Referential Integrity

Which one of the following does not help to maintain referential integrity?
a. Unique constraints
b. Primary keys
c. Cascading actions
d. Foreign keys

Questions by neelima vasili

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The answer is Unique constraints.

We are using the Ferein keys and the cascade action to implement and enforce the referential ontegrity contraints.

Since the foreign key is related to the primary key of some other tables, primary key also we can include as a part of referential integrity.

Ratheesh Nellikkal

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