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Integrity Constraints

  1. Integrity constraints provide a way of ensuring that changes made to the database by authorized users do not result in a loss of data consistency.
  2. We saw a form of integrity constraint with E-R models:
  3. An integrity constraint can be any arbitrary predicate applied to the database.
  4. They may be costly to evaluate, so we will only consider integrity constraints that can be tested with minimal overhead.

Osmar Zaiane
Tue Jun 9 15:12:55 PDT 1998