848 search results - page 86 / 170 » Optimization of Sequence Queries in Database Systems |
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Aggregate measures summarizing subsets of data are valuable in exploratory analysis and decision support, especially when dependent aggregations can be easily specified and compute...
FUIN
2006
13 years 8 months ago
2006
In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorithm due to M...
WWW
2004
ACM
14 years 9 months ago
2004
ACM
A technical infrastructure for storing, querying and managing RDF data is a key element in the current semantic web development. Systems like Jena, Sesame or the ICS-FORTH RDF Sui...
ICDE
2009
IEEE
14 years 10 months ago
2009
IEEE
Materializing results from complex aggregation queries helps to significantly improve response times in OLAP servers. This problem is known as the view selection problem: choosing ...
ADC
2006
Springer
14 years 2 months ago
2006
Springer
With the increasing popularity of XML, there arises the need for managing and querying information in this form. Several query languages, such as XQuery, have been proposed which ...