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Handling fuzzy information in extended possibility-based fuzzy relational databases

โœ Scribed by Z. M. Ma; F. Mili

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
111 KB
Volume
17
Category
Article
ISSN
0884-8173

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โœฆ Synopsis

Two kinds of fuzziness in attribute values of the fuzzy relational databases can be distinguished: One is that attribute values are possibility distributions, and the other is that there are resemblance relations in attribute domains. The fuzzy relational databases containing these two kinds of fuzziness simultaneously are called extended possibility-based fuzzy relational databases. In this paper, we focus on such fuzzy relational databases. We classify two kinds of fuzzy data redundancies and define their removal. On this basis, we define fuzzy relational operations in relational algebra, which, being similar to the conventional relational databases, are complete and sound. In particular, we investigate fuzzy querying strategies and give the form of fuzzy querying with SQL.

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