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What is Integrity Satisfaction, Integrity Violation

Chapter 153
Encyclopedia of Information Science and Technology, Second Edition
Integrity is satisfied if each integrity constraint in the database schema, queried as a denial, returns the empty answer. Integrity is violated if any one of these integrity constraints returns a non-empty answer. Then, the database is also said to be inconsistent.
Published in Chapter:
Database Integrity Checking
Hendrik Decker (Universidad Politécnica de Valencia, Spain) and Davide Martinenghi (Free University of Bozen/Bolzano, Italy)
Copyright: © 2009 |Pages: 6
DOI: 10.4018/978-1-60566-026-4.ch153
Abstract
Integrity constraints (or simply “constraints”) are formal representations of invariant conditions for the semantic correctness of database records. Constraints can be expressed in declarative languages such as datalog, predicate logic, or SQL. This article highlights the historical background of integrity constraints and the essential features of their simplified incremental evaluation. It concludes with an outlook on future trends.
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