Multiple choice technology programming languages

Referential integrity refers to what

  1. The enforced uniqueness of row in a table

  2. The enforced uniqueness of column in a table

  3. Ensuring that a foreign key attribute cannot be null

  4. The Enforced synchronization of primary key and foreign key values
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D Correct answer
Explanation

Referential integrity ensures that relationships between tables remain consistent. It guarantees that a foreign key value either matches a valid primary key in the related table or is NULL, preventing orphaned records and maintaining valid data relationships across tables.

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