3225 search results - page 256 / 645 » Query Optimization by Stored Queries |
199
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ALENEX
2001
15 years 7 months ago
2001
In nearest neighbor searching we are given a set of n data points in real d-dimensional space, d , and the problem is to preprocess these points into a data structure, so that give...
177
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EDBT
2009
ACM
16 years 1 months ago
2009
ACM
Materialized views (MV) can significantly improve the query performance of relational databases. In this paper, we consider MVs to optimize complex scenarios where many heterogen...
278
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ICDE
2008
IEEE
16 years 7 months ago
2008
IEEE
We study the scalable management of XML data in P2P networks based on distributed hash tables (DHTs). We identify performance limitations in this context, and propose an array of t...
154
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SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
Traditional databases store sets of relatively static records with no pre-defined notion of time, unless timestamp attributes are explicitly added. While this model adequately rep...
187
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NCA
2009
IEEE
16 years 28 days ago
2009
IEEE
—In industries such as healthcare, there is a need to electronically share privacy-sensitive data across distinct organizations. We show how this can be done while allowing organ...