35 search results - page 6 / 7 » Selecting and Using Views to Compute Aggregate Queries (Exte... |
ISPAN
2009
IEEE
14 years 1 months ago
2009
IEEE
Abstract—Querying non-conventional data sources is recognized as a major issue in new environments and applications such as those occurring in pervasive computing. A key issue is...
BTW
2007
Springer
14 years 1 months ago
2007
Springer
: Statistics that accurately describe the distribution of data values in the columns of relational tables are essential for effective query optimization in a database management sy...
DAWAK
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. A federated data warehouse is a logical integration of data warehouses applicable when physical integration is impossible due to privacy policy or legal restrictions. In ...
EDBT
2002
ACM
14 years 7 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
BTW
2007
Springer
14 years 1 months ago
2007
Springer
Abstract: Peer data management systems (PDMS) are a highly dynamic, decentralized infrastructure for large-scale data integration. They consist of a dynamic set of autonomous peers...