84 search results - page 13 / 17 » Multi-source Materialized Views Maintenance: Multi-level Vie... |
VLDB
1998
ACM
15 years 1 months ago
1998
ACM
Data warehouses collect data into materialized views for analysis. After some time, some of the data may no longer be needed or may not be of interest. In this paper, we handle th...
101
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WWW
2011
ACM
14 years 4 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, ...
171
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ICDE
2001
IEEE
15 years 10 months ago
2001
IEEE
We consider the problems of computing aggregation queries in temporal databases, and of maintaining materialized temporal aggregate views efficiently. The latter problem is partic...
EDBTW
2006
Springer
14 years 11 months ago
2006
Springer
Abstract. Since XML is used as a storage format in an increasing number of applications, security has become an important issue in XML databases. One aspect of security is restrict...
97
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IEEECIT
2005
IEEE
15 years 3 months ago
2005
IEEE
Web warehouse provides high availability and efficiency by utilizing materialized webviews, which should be refreshed in time to keep freshness. During the refreshing, the consis...