1000 search results - page 26 / 200 » Provenance for Aggregate Queries |
DASFAA
2007
IEEE
14 years 4 months ago
2007
IEEE
Abstract. In this paper, we explore the feature of sharing partial results of multiple queries to reduce the total number of messages incurred. Those queries sharing their partial ...
IS
2002
13 years 9 months ago
2002
In this paper, we explore the possibility of transforming queries with minimum and maximum predicates into equivalent queries that can be computed more efficiently. The main contr...
PODS
2010
ACM
14 years 2 months ago
2010
ACM
This paper approaches the incremental view maintenance problem from an algebraic perspective. We construct a ring of databases and use it as the foundation of the design of a quer...
ICDM
2007
IEEE
14 years 4 months ago
2007
IEEE
Data security is a critical issue for many organizations. Sensitive data must be protected from both inside and outside attackers. Access control policies and related mechanisms h...
PODS
1999
ACM
14 years 2 months ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...