Multiple choice technology databases

Which one of the following does not help to maintain referential integrity?

  1. Unique constraints

  2. Primary keys

  3. Cascading actions

  4. Foreign keys

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A Correct answer
Explanation

Referential integrity ensures relationships between tables remain consistent. Primary keys, foreign keys, and cascading actions (like ON DELETE CASCADE) are core mechanisms for this. Unique constraints ensure data uniqueness but do not inherently manage relationships between different tables.