2987 search results - page 304 / 598 » Multiobjective Query Optimization |
163
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DASFAA
2010
IEEE
15 years 6 months ago
2010
IEEE
This paper studies a new query on uncertain data, called k-selection query. Given an uncertain dataset of N objects, where each object is associated with a preference score and a p...
131
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WISE
2002
Springer
15 years 7 months ago
2002
Springer
To make the World Wide Web machine-understandable there is a strong demand both for languages describing metadata and for languages querying metadata. The Resource Description Fram...
154
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JACM
2008
15 years 2 months ago
2008
XML queries are usually expressed by means of XPath expressions identifying portions of the selected documents. An XPath expression defines a way of navigating an XML tree and ret...
149
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SIGMOD
2004
ACM
16 years 2 months ago
2004
ACM
Existing SQL aggregate functions present important limitations to compute percentages. This article proposes two SQL aggregate functions to compute percentages addressing such lim...
151
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IDEAS
2009
IEEE
15 years 9 months ago
2009
IEEE
In this paper, we present our work on evaluating the skyline algorithms BNL, SFS, and a variant of LESS in PostgreSQL. It is well known that the performance of skyline queries is ...