Extended SQL support for uncertain data

  • Debabrata Dey
  • Sumit Sarkar
Session 4a: Languages
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1331)


Although the relational model for databases provides a great range of advantages over other data models, it lacks a comprehensive way for handling uncertain data. Uncertainty in data values, however, is pervasive in all real world environments and has received some attention in the literature. Several methods have been proposed for incorporating uncertain data into relational databases; however, these approaches have many shortcomings. In this paper, we discuss a probabilistic extension of the relational model and propose a query language for creation, modification, and retrieval of uncertain data.


Faculty Member Data Item Query Language Marginal Probability Uncertain Data 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Debabrata Dey
    • 1
  • Sumit Sarkar
    • 2
  1. 1.School of BusinessUniversity of WashingtonSeattle
  2. 2.College of BusinessLouisiana State UniversityBaton Rouge

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