Integrity constraints are semantic conditions that a database should satisfy in order to be an appropriate model of external reality. In practice, and for many reasons, a database may not satisfy those integrity constraints, and for that reason it is said to be inconsistent. However, and most likely a large portion of the database is still semantically correct, in a sense that has to be made precise. After having provided a formal characterization of consistent data in an inconsistent database, the natural problem emerges of extracting that semantically correct data, as query answers.
- ISBN10 160845763X
- ISBN13 9781608457632
- Publish Date 9 September 2011 (first published 22 August 2011)
- Publish Status Active
- Imprint Morgan & Claypool
- Format eBook
- Pages 121
- Language English