1125 search results - page 57 / 225 » Query Answering in Inconsistent Databases |
AMW
2009
13 years 11 months ago
2009
We investigate the space requirements for summaries needed for maintaining exact answers to aggregate queries over histories of relational databases. We show that, in general, a su...
EDBT
2008
ACM
14 years 10 months ago
2008
ACM
In the classical database world, information access has been based on a paradigm that involves structured, schema-aware, queries and tabular answers. In the current environment, h...
WEBDB
2005
Springer
14 years 3 months ago
2005
Springer
As a simple XML query language but with enough expressive power, XPath has become very popular. To expedite evaluation of XPath queries, we consider the problem of caching results...
GIS
1995
ACM
14 years 1 months ago
1995
ACM
An algorithm is presented to answer window queries in a quadtree-based spatial database environment by retrieving the covering blocks in the underlying spatial database. It works ...
SIGMOD
2005
ACM
14 years 10 months ago
2005
ACM
Personalization is a powerful mechanism that helps users to cope with the abundance of information on the Web. Database query personalization achieves this by dynamically construc...