1125 search results - page 163 / 225 » Query Answering in Inconsistent Databases |
126
click to vote
PODS
2008
ACM
16 years 2 months ago
2008
ACM
In the study of data exchange one usually assumes an openworld semantics, making it possible to extend instances of target schemas. An alternative closed-world semantics only move...
124
Voted
SIGMOD
1998
ACM
15 years 6 months ago
1998
ACM
Query optimization is an integral part of relational database management systems. One important task in query optimization is selectivity estimation, that is, given a query P, we ...
115
click to vote
DBISP2P
2004
Springer
15 years 7 months ago
2004
Springer
Peer-to-Peer infrastructures are emerging as one of the important data management infrastructures in the World Wide Web. So far, however, most work has focused on simple P2P networ...
128
click to vote
SIGMOD
2002
ACM
16 years 2 months ago
2002
ACM
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
192
click to vote
VLDB
2007
ACM
16 years 2 months ago
2007
ACM
Given a set of multidimensional data points, skyline query retrieves a set of data points that are not dominated by any other points. This query is useful for multi-preference ana...