964 search results - page 18 / 193 » Efficiently Ordering Query Plans for Data Integration |
DEXAW
2004
IEEE
15 years 1 months ago
2004
IEEE
Database-like query processing over a network of sensors has become an attractive paradigm for building sensor applications. A sensor query is characterized by data streams among ...
77
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VLDB
1999
ACM
15 years 1 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
EDBTW
2004
Springer
15 years 2 months ago
2004
Springer
Many users and applications require the integration of semi-structured data from autonomous, heterogeneous Web sources. Over the last years mediator systems have emerged that use d...
XSYM
2007
Springer
15 years 3 months ago
2007
Springer
: Mashups exemplify a workflow-like approach to dynamically integrate data and services from multiple web sources. Such integration workflows can build on existing services for web...
108
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ADHOCNOW
2008
Springer
14 years 10 months ago
2008
Springer
This paper presents a novel method for optimizing sliding window based continuous queries. We deal with two categories of aggregation operations: stepwise aggregation (e.g. COUNT) ...