542 search results - page 21 / 109 » An Effective SPARQL Support over Relational Databases |
146
Voted
CIKM
2005
Springer
15 years 9 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 ...
109
Voted
EDBT
2008
ACM
16 years 3 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...
118
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DSS
2002
15 years 3 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...
151
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NAR
2011
14 years 6 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...
124
Voted
DASFAA
2004
IEEE
15 years 7 months 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...