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An Extension of Data Description Language (DDL) for Fuzzy Data Handling

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Flexible Query Answering Systems

Part of the book series: Advances in Soft Computing ((AINSC,volume 7))

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Abstract

In this paper, we extend an existing relational language such as SQL with capabilities for representing and handling imprecise information. We add new sentences to manage new types based on a domain concept extension. New values for these types are added, including three ones for a more specialized management of NULL values.

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References

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Author information

Authors and Affiliations

  1. Department of Computer Science and Artificial Intelligence, University of Granada, Granada, Spain

    I. J. Blanco, N. Marin, O. Pons & M. A. Vila

Authors
  1. I. J. Blanco
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  2. N. Marin
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  3. O. Pons
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  4. M. A. Vila
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Editor information

Editors and Affiliations

  1. Computer Science Department, Roskilde University, P.O. Box 260, 4000, Roskilde, Denmark

    Henrik L. Larsen , Troels Andreasen  & Henning Christiansen ,  & 

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

    Janusz Kacprzyk  & Sławomir Zadrożny  & 

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© 2001 Springer-Verlag Berlin Heidelberg

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Blanco, I.J., Marin, N., Pons, O., Vila, M.A. (2001). An Extension of Data Description Language (DDL) for Fuzzy Data Handling. In: Larsen, H.L., Andreasen, T., Christiansen, H., Kacprzyk, J., Zadrożny, S. (eds) Flexible Query Answering Systems. Advances in Soft Computing, vol 7. Physica, Heidelberg. https://doi.org/10.1007/978-3-7908-1834-5_5

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  • DOI: https://doi.org/10.1007/978-3-7908-1834-5_5

  • Publisher Name: Physica, Heidelberg

  • Print ISBN: 978-3-7908-1347-0

  • Online ISBN: 978-3-7908-1834-5

  • eBook Packages: Springer Book Archive

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