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Managing Inconsistent Databases Using Active Integrity Constraints

Managing Inconsistent Databases Using Active Integrity Constraints

Sergio Flesca, Sergio Greco, Ester Zumpano
Copyright: © 2005 |Pages: 6
ISBN13: 9781591405603|ISBN10: 1591405602|EISBN13: 9781591407959
DOI: 10.4018/978-1-59140-560-3.ch059
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MLA

Flesca, Sergio, et al. "Managing Inconsistent Databases Using Active Integrity Constraints." Encyclopedia of Database Technologies and Applications, edited by Laura C. Rivero, et al., IGI Global, 2005, pp. 345-350. https://doi.org/10.4018/978-1-59140-560-3.ch059

APA

Flesca, S., Greco, S., & Zumpano, E. (2005). Managing Inconsistent Databases Using Active Integrity Constraints. In L. Rivero, J. Doorn, & V. Ferraggine (Eds.), Encyclopedia of Database Technologies and Applications (pp. 345-350). IGI Global. https://doi.org/10.4018/978-1-59140-560-3.ch059

Chicago

Flesca, Sergio, Sergio Greco, and Ester Zumpano. "Managing Inconsistent Databases Using Active Integrity Constraints." In Encyclopedia of Database Technologies and Applications, edited by Laura C. Rivero, Jorge Horacio Doorn, and Viviana E. Ferraggine, 345-350. Hershey, PA: IGI Global, 2005. https://doi.org/10.4018/978-1-59140-560-3.ch059

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Abstract

Integrity constraints are a fundamental part of a database schema. They are generally used to define constraints on data (functional dependencies, inclusion dependencies, exclusion dependencies, etc.), and their enforcement ensures a semantically correct state of a database. As the presence of data inconsistent with respect to integrity constraints is not unusual, its management plays a key role in all the areas in which duplicate or conflicting information is likely to occur, such as database integration, data warehousing, and federated databases (Bry, 1997; Lin, 1996; Subrahmanian, 1994). It is well known that the presence of inconsistent data can be managed by “repairing” the database, that is, by providing consistent databases, obtained by a minimal set of update operations on the inconsistent original environment, or by consistently answering queries posed over the inconsistent database.

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