620 search results - page 14 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
DOLAP
2004
ACM
15 years 5 months ago
2004
ACM
A peer-to-peer (P2P) data management system consists essentially of a network of peer systems, each maintaining full autonomy over its own data resources. Data exchange between pe...
122
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EDBT
2012
ACM
13 years 2 months ago
2012
ACM
In this paper we consider the problem of answering queries using views, with or without ontological constraints, which is important for data integration, query optimization, and d...
EDBT
2008
ACM
15 years 12 months ago
2008
ACM
We address the problem of generating a mediated schema from a set of relational data source schemas and conjunctive queries that specify where those schemas overlap. Unlike past a...
100
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ADBIS
2005
Springer
15 years 5 months ago
2005
Springer
We present a formal analysis of the following view-selection problem: Given a set of queries and a database, return definitions of views that, when materialized in the database, w...
101
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DEXAW
2007
IEEE
15 years 6 months ago
2007
IEEE
The semantic web represents meta-data as a relation of triples using the RDF data model. We have developed a virtual repository system that enables to process queries to RDF views...