716 search results - page 91 / 144 » Optimizing Queries in Extended Relational Databases |
BTW
2009
Springer
15 years 2 months ago
2009
Springer
Today, more and more enterprises process XML data, many of them already in XML database systems. Once systems start to grow in size, scalability becomes an issue. One of the core o...
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VLDB
2005
ACM
15 years 11 months ago
2005
ACM
Abstract Declarative queries are proving to be an attractive paradigm for interacting with networks of wireless sensors. The metaphor that "the sensornet is a database" i...
PODS
1999
ACM
15 years 3 months ago
1999
ACM
One of the most important types of query processing in spatial databases and geographic information systems is the spatial join, an operation that selects, from two relations, all...
ICDT
2010
ACM
15 years 8 months ago
2010
ACM
Sources of data uncertainty and imprecision are numerous. A way to handle this uncertainty is to associate probabilistic annotations to data. Many such probabilistic database mode...
ICDT
2005
ACM
15 years 4 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...