2145 search results - page 61 / 429 » Answering Queries Using Views |
107
Voted
DASFAA
2007
IEEE
15 years 9 months ago
2007
IEEE
XML is by now the de facto standard for exporting and exchanging data on the web. The need for querying XML data sources whose structure is not fully known to the user and the need...
148
Voted
AMW
2009
15 years 3 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...
155
Voted
ADBIS
2004
Springer
15 years 8 months ago
2004
Springer
In this paper we consider concurrent execution of multiple data mining queries in the context of discovery of frequent itemsets. If such data mining queries operate on similar part...
116
Voted
TREC
2007
15 years 3 months ago
2007
In this paper we present a system which uses ontological resources and a gene name variation generation tool to expand concepts in the original query. The novelty of our approach ...
135
Voted
KR
1992
Springer
15 years 6 months ago
1992
Springer
While the task of answering queries from an arbitrary propositional theory is intractable in general, it can typicallybe performed e ciently if the theory is Horn. This suggests t...