620 search results - page 48 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
170
Voted
DMDW
2000
15 years 5 months ago
2000
Data warehousing is a software infrastructure which supports OLAP applications by providing a collection of tools which allow data extraction and cleaning, data integration and ag...
163
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JODS
2006
15 years 3 months ago
2006
While providing a uniform syntax and a semistructured data model, XML does not express semantics but only structure such as nesting information. In this paper, we consider the prob...
143
Voted
DBA
2006
15 years 5 months ago
2006
In order to facilitate query processing, the information contained in data warehouses is typically stored as a set of materialized views. Deciding which views to materialize prese...
134
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VLDB
1998
ACM
15 years 8 months ago
1998
ACM
Many applications compute aggregate functions over an attribute (or set of attributes) to find aggregate values above some specified threshold. We call such queries iceberg querie...
248
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GIS
2005
ACM
16 years 5 months ago
2005
ACM
The R*-tree, as a state-of-the-art spatial index, has already found its way into commercial systems like Oracle. In this paper, we aim at improving query performance of the R*tree...