542 search results - page 21 / 109 » An Effective SPARQL Support over Relational Databases |
CIKM
2005
Springer
14 years 2 months ago
2005
Springer
Modern query optimizers select an efficient join ordering for a physical execution plan based essentially on the average join selectivity factors among the referenced tables. In ...
EDBT
2008
ACM
14 years 8 months ago
2008
ACM
In this paper we study the problem of mining all frequent queries in a given database table, a problem known to be intractable even for conjunctive queries. We restrict our attent...
DSS
2002
13 years 8 months ago
2002
Studies of the effect of individual differences on usage of information systems have yielded mixed results. This study examines the effect of individual differences on the perceiv...
NAR
2011
12 years 11 months ago
2011
During the development of methods for cancer diagnosis and treatment, a vast amount of information is generated. Novel cancer target proteins have been identified and many compoun...
DASFAA
2004
IEEE
14 years 10 days ago
2004
IEEE
Users of database applications, especially in the e-commerce domain, often resort to exploratory "trial-and-error" queries since the underlying data space is huge and unf...