716 search results - page 81 / 144 » Optimizing Queries in Extended Relational Databases |
182
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ICDE
2008
IEEE
16 years 20 days ago
2008
IEEE
Data sources on the web are often accessible through web interfaces that present them as relational tables, but require certain attributes to be mandatorily selected, e.g., via a w...
113
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EDBT
2012
ACM
13 years 1 months ago
2012
ACM
Query optimization in RDF Stores is a challenging problem as SPARQL queries typically contain many more joins than equivalent relational plans, and hence lead to a large join orde...
ICEBE
2005
IEEE
15 years 4 months ago
2005
IEEE
Electronic commerce is emerging as a major application area for database systems. A large number of e-commerce stores provide electronic product catalogs that allow customers to s...
122
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ISPAN
2009
IEEE
15 years 6 months ago
2009
IEEE
Abstract—Querying non-conventional data sources is recognized as a major issue in new environments and applications such as those occurring in pervasive computing. A key issue is...
107
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SEMWEB
2010
Springer
14 years 9 months ago
2010
Springer
RDF(S) and OWL 2 currently support only static ontologies. In practice, however, the truth of statements often changes with time, and Semantic Web applications often need to repres...