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Extending the relational model to deal with probabilistic data. (English) Zbl 0969.68630
Summary: According to the soundness and completeness of information in databases, the expressive form and the semantics of incomplete information are discussed in this paper. On the basis of the discussion, the current studies on incomplete data in relational databases are reviewed. In order to represent stochastic uncertainty in most general sense in the real world, probabilistic data are introduced into relational databases. An extended relational data model is presented to express and manipulate probabilistic data and the operations in relational algebra based on the extended model are defined in this paper.
68U99 Computing methodologies and applications
68P15 Database theory
Full Text: DOI
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