71 search results - page 9 / 15 » RankSQL: Query Algebra and Optimization for Relational Top-k... |
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ICDE
2006
IEEE
15 years 11 months ago
2006
IEEE
Relational division, also known as small divide, is a derived operator of the relational algebra that realizes a many-to-one set containment test, where a set is represented as a ...
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ICDT
2010
ACM
15 years 7 months ago
2010
ACM
We study fundamental aspects related to the efficient processing of the SPARQL query language for RDF, proposed by the W3C to encode machine-readable information in the Semantic W...
PPDP
2010
Springer
14 years 8 months ago
2010
Springer
Database query optimizers rely on data statistics in selecting query execution plans. Similar query optimization techniques are desirable for deductive databases and, to make this...
ESWS
2008
Springer
14 years 11 months ago
2008
Springer
The goal of this paper is to give an overview of the basics of the theory of RDF databases. We provide a formal definition of RDF that includes the features that distinguish this m...
DEXAW
1999
IEEE
15 years 1 months ago
1999
IEEE
This paper describes an algebra for use with parallel object databases, and in particular ODMG compliant databases with OQL. Although there have been many proposals for parallel r...