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DAISD
1994
13 years 11 months ago
1994
We are interested in the problem of validating the consistency of integrity constraints when data is modi ed. In particular, we consider how constraints can be checked with only p...
ER
2008
Springer
13 years 11 months ago
2008
Springer
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
WEBDB
2000
Springer
14 years 1 months ago
2000
Springer
Rewriting queries using views is a powerful technique that has applications in data integration, data warehousing and query optimization. Query rewriting in relational databases i...
VLDB
2006
ACM
14 years 9 months ago
2006
ACM
In this paper we study the following problem. Given a database and a set of queries, we want to find a set of views that can compute the answers to the queries, such that the amoun...
PODS
2003
ACM
14 years 9 months ago
2003
ACM
In this paper we study the following problem. Given a database and a set of queries, we want to find, in advance, a set of views that can compute the answers to the queries, such ...