Skip to main content
SpringerLink
Log in
SpringerLink
Log in

Flexible Querying with Fuzzy Projection

  • Conference paper
Advances in Web Intelligence (AWIC 2005)

Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 3528))

Included in the following conference series:

  • 939 Accesses

Abstract

In the paper we present a new operation called fuzzy projection that extends flexible querying languages. It consists in fuzzification of tuples for all linguistic variables defined on domains of attributes specified in a query. In result, tuples with linguistic variables, instead of original values, are displayed. On the basis of fuzzy projection a specific fuzzy group-by operation is introduced. These two operations are implemented as a part of SQLf_j language based on SQLf introduced by Bosc and Pivert.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution
Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bosc, P., Pivert, O.: SQLf: A Relational Database Language for Fuzzy Querying. IEEE Trans. on Fuzzy Systems 3, 1–17 (1995)

    Article  Google Scholar 

  2. Buckles, B.P., Petry, F.E.: A fuzzy representation of data for relational databases. Fuzzy Sets and Systems 5, 213–226 (1982)

    Article  Google Scholar 

  3. Dembczyński, K., Hapke, M., Przybyl, D.: SQLf_j - a fuzzy querying language and application. Research Report RA-010/04, Poznań University of Technology (2004)

    Google Scholar 

  4. Kacprzyk, J., Zadrożny, S.: FQuery for Access: Fuzzy Querying for Windows-Based DBMS. In: Bosc, P., Kacprzyk, J. (eds.) Fuzziness in Database Management Systems. Physica-Verlag, Heidelberg (1995)

    Google Scholar 

  5. Rasmussen, D., Yager, R.R.: SummarySQL - A flexible fuzzy query language. In: Proceedings of the Second Workshop on Flexible Query-Answering Systems, Roskilde, Denmark, pp. 1–18 (1996)

    Google Scholar 

  6. Yager, R.R.: A new approach to the summarization of data. Information Sciences 28, 69–86 (1982)

    Article  MATH  MathSciNet  Google Scholar 

  7. Yen, Y., Langari, R.: Fuzzy Logic: Intelligence, Control and Information. Prentice-Hall, Englewood Cliffs (1998)

    Google Scholar 

  8. Zadeh, L.A.: Fuzzy Sets. Inform. and Control 8, 338–353 (1965)

    Article  MATH  MathSciNet  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Computing Science, Poznań University of Technology, 60-965, Poznań, Poland

    Krzysztof Dembczyński, Maciej Hapke & Dominik Przybył

Authors
  1. Krzysztof Dembczyński
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Maciej Hapke
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Dominik Przybył
    View author publications

    You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

  1. Systems Research Institute, Polish Academy of Sciences, Newelska 6, 01-447, Warsaw, Poland

    Piotr S. Szczepaniak

  2. Systems Research Institute, Polish Academy of Sciences, ul. Newelska 6, 01–447, Warsaw, Poland

    Janusz Kacprzyk

  3. Institute of Computer Science, Technical University of Łódź, Poland

    Adam Niewiadomski

Rights and permissions

Reprints and permissions

Copyright information

© 2005 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Dembczyński, K., Hapke, M., Przybył, D. (2005). Flexible Querying with Fuzzy Projection. In: Szczepaniak, P.S., Kacprzyk, J., Niewiadomski, A. (eds) Advances in Web Intelligence. AWIC 2005. Lecture Notes in Computer Science(), vol 3528. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11495772_20

Download citation

  • DOI: https://doi.org/10.1007/11495772_20

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-26219-0

  • Online ISBN: 978-3-540-31900-9

  • eBook Packages: Computer ScienceComputer Science (R0)

Publish with us

Policies and ethics

Search

Navigation