6004 search results - page 268 / 1201 » Parallelizing query optimization |
92
Voted
PODS
2003
ACM
16 years 2 months ago
2003
ACM
In this paper we study the following problem. Given a database and a set of queries, we want to find, in advance, a set of views that can compute the answers to the queries, such ...
136
Voted
EDBT
2006
ACM
16 years 2 months ago
2006
ACM
In this paper we present a novel approach for estimating the selectivity of XML twig queries. Such a technique is useful for approximate query answering as well as for determining...
106
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WEBDB
2009
Springer
15 years 8 months ago
2009
Springer
The question whether a given set of views, defined by queries, can be used to answer another query, arises in several contexts such as query optimization, data integration and se...
138
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SEMWEB
2009
Springer
15 years 8 months ago
2009
Springer
RDF Schema (RDFS) as a lightweight ontology language is gaining popularity and, consequently, tools for scalable RDFS inference and querying are needed. SPARQL has become recently ...
137
Voted
COOPIS
2003
IEEE
15 years 7 months ago
2003
IEEE
The use of semantic knowledge in its various forms has become an important aspect in managing data in database and information systems. In the form of integrity constraints, it ha...