62 search results - page 7 / 13 » Containment of Conjunctive Queries over Databases with Null ... |
ICDE
2012
IEEE
11 years 9 months ago
2012
IEEE
— Uncertainties in data arise for a number of reasons: when the data set is incomplete, contains conflicting information or has been deliberately perturbed or coarsened to remov...
ADBIS
2004
Springer
14 years 11 days ago
2004
Springer
Abstract. Query rewriting method is proposed for the heterogeneous information integration infrastructure formed by the subject mediator environment. Local as View (LAV) approach t...
ICDE
2010
IEEE
14 years 6 months ago
2010
IEEE
Uncertain data are inherent in many applications such as environmental surveillance and quantitative economics research. As an important problem in many applications, KNN query has...
NAR
2007
13 years 6 months ago
2007
The GeneTrees phylogenomics system pursues comparative genomic analyses from the perspective of gene phylogenies for individual genes. The GeneTrees project has the goal of provid...
VLDB
2000
ACM
13 years 10 months ago
2000
ACM
Strict consistency of replicated data is infeasible or not required by many distributed applications, so current systems often permit stale replication, in which cached copies of ...