2724 search results - page 215 / 545 » Optimizing Queries on Files |
227
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VLDB
2001
ACM
16 years 4 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 accessing...
151
Voted
SIGMOD
2004
ACM
16 years 3 months ago
2004
ACM
Peer data management systems (PDMS) offer a flexible architecture for decentralized data sharing. In a PDMS, every peer is associated with a schema that represents the peer's...
121
Voted
GCC
2007
Springer
15 years 10 months ago
2007
Springer
Data integration has evolved to provide efficient data management across distributed and heterogeneous data sources in grid environment. However, existing works in data integratio...
123
Voted
ICDT
2005
ACM
15 years 9 months ago
2005
ACM
We study the problem of rewriting queries using views in the presence of access patterns, integrity constraints, disjunction, and negation. We provide asymptotically optimal algori...
124
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VLDB
2004
ACM
15 years 9 months ago
2004
ACM
When a client submits a set of XPath queries to a XML database on a network, the set of answer sets sent back by the database may include redundancy in two ways: some elements may...