620 search results - page 7 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
88
Voted
AAAI
2006
15 years 1 months ago
2006
We consider the problem of rewriting a query efficiently using materialized views. In the context of information integration, this problem has received significant attention in th...
99
Voted
AMW
2009
15 years 24 days ago
2009
Abstract. Rewriting of conjunctive queries using views has many applications in database and data integration. We investigate ways to improve performance of rewriting and propose a...
124
Voted
WWW
2011
ACM
14 years 6 months ago
2011
ACM
The problem of answering SPARQL queries over virtual SPARQL views is commonly encountered in a number of settings, including while enforcing security policies to access RDF data, ...
185
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VLDB
2001
ACM
15 years 12 months ago
2001
ACM
The problem of answering queries using views is to find efficient methods of answering a query using a set of previously materialized views over the database, rather than accessin...
102
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EDBT
2002
ACM
15 years 11 months ago
2002
ACM
The problem of finding contained rewritings of queries using views is of great importance in mediated data integration systems. In this paper, we first present a general approach f...