3969 search results - page 336 / 794 » Query Processing Using Ontologies |
245
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ICDE
1997
IEEE
16 years 5 months ago
1997
IEEE
A mediator is a domain-speci c tool to support uniform access to multiple heterogeneous information sources and to abstract and combine data from different but related databases t...
225
Voted
SIGMOD
2009
ACM
16 years 4 months ago
2009
ACM
In order to enable extensibility, modern query optimizers typically leverage a transformation rule based framework. Testing individual rule correctness as well as correctness of r...
138
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P2P
2005
IEEE
15 years 10 months ago
2005
IEEE
Among the open problems in P2P systems, support for non-trivial search predicates, standardized query languages, distributed query processing, query load balancing, and quality of...
144
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SIGMOD
2010
ACM
15 years 9 months ago
2010
ACM
Current relational databases require that a database schema exist prior to data entry and require manual optimization for best performance. We describe the query optimization tech...
153
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SIGMOD
2010
ACM
15 years 9 months ago
2010
ACM
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...