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Answering Queries Using Views

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Encyclopedia of Database Systems

Synonyms

Query rewriting using views

Definition

Answering queries using views refers to a data management problem and the set of related techniques, algorithms and other results to address it. The basic formulation of the problem is the following: Given a query Q over a database schema Σ, expressed in a query language L Q and a set of views V 1, V 2,…,V n over the same schema, expressed in a query language L V , is it possible to answer the query Q using (only) the views V 1, V 2,…,V n ?

The problem has a number of related formulations: What is the maximal set of tuples in the answer of Q that can be obtained from the views? If it is possible to access both the views and the database relations, what is the cheapest query execution plan for answering Q?

From the above, it is clear that this is more generally a family of problems. Problems of different complexity, often admitting different (or no) solutions and solution techniques, result from making choices about various “parameters” of...

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Recommended Reading

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Author information

Authors and Affiliations

  1. Athens University of Economics and Business, Athens, Greece

    Vasilis Vassalos

Authors
  1. Vasilis Vassalos
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Corresponding author

Correspondence to Vasilis Vassalos .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, Georgia, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, Ontario, Canada

    M. Tamer Özsu

Section Editor information

  1. Computer Science Dept., Athens Univ. of Economics and Business, 76, Patission Ave, 104 34, Athens, Greece

    Yannis Kotidis

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Vassalos, V. (2016). Answering Queries Using Views. In: Liu, L., Özsu, M. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4899-7993-3_849-2

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  • DOI: https://doi.org/10.1007/978-1-4899-7993-3_849-2

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  • Publisher Name: Springer, New York, NY

  • Online ISBN: 978-1-4899-7993-3

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