951 search results - page 27 / 191 » Groupwise Processing of Relational Queries |
GIS
2008
ACM
14 years 11 months ago
2008
ACM
Location-based services are increasingly popular and it is a key challenge to efficiently support query processing. We present a novel design to process large numbers of location...
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ICDE
2007
IEEE
15 years 11 months ago
2007
IEEE
Current distributed database and stream processing systems assume that the network connecting nodes in the data processor is "always on," and that the absence of a netwo...
SSDBM
1999
IEEE
15 years 2 months ago
1999
IEEE
Conducting bioinformatic analyses involves biologists in expressing requests over a range of highly heterogeneous information sources and software tools. Such activities are labor...
SSDBM
2002
IEEE
15 years 2 months ago
2002
IEEE
This paper presents an approach to answering queries over an ontology modelled using a description logic. The ontology acts as a global schema, providing a declarative description...
PVLDB
2010
14 years 8 months ago
2010
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...