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Continuous Queries in Sensor Networks

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Encyclopedia of Database Systems

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Synonyms

Long running queries

Definition

A powerful programming paradigm for data acquisition and dissemination in sensor networks is a declarative query interface. With a declarative query interface, the sensor network is programmed for long term monitoring and event detection applications through continuous queries, which specify what data to retrieve at what time or under what conditions. Unlike snapshot queries which execute only once, continuous queries are evaluated periodically until the queries expire. Continuous queries are expressed in a high-level language, and are compiled and installed on target sensor nodes, controlling when, where, and what data is sampled, possibly filtering out unqualified data through local predicates. Continuous queries can have a variety of optimization goals, from improving result quality and response time to reducing energy consumption and prolonging network lifetime.

Historical Background

In recent years sensor networks have been deployed...

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Author information

Authors and Affiliations

  1. Cornell University, Ithaca, NY, USA

    Yong Yao & Johannes Gehrke

Authors
  1. Yong Yao
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  2. Johannes Gehrke
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Editor information

Editors and Affiliations

  1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

    LING LIU (Professor) (Professor)

  2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

    M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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© 2009 Springer Science+Business Media, LLC

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Yao, Y., Gehrke, J. (2009). Continuous Queries in Sensor Networks. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_84

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