Edición de la obra Database repairing and consistent query answering
| Autor | Leopoldo Bertossi |
|---|---|
| Editorial | Morgan & Claypool |
| Fecha de publicación | 2011 |
| Lugar | San Rafael, Calif. (1537 Fourth Street, San Rafael, CA 94901 USA) |
| Idioma | inglés |
| Páginas | 105 |
| Formato | [electronic resource] / |
| ISBN-13 | 9781608457632, 9781608457625 |
| OCLC | 758381916 |
| Serie | Synthesis lectures on data management -- # 20 |
| Número de Cutter |
B547d |
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.