General multiple-objective decision functions and linguistically quantified statements
International Journal of Man-Machine Studies - Lecture notes in computer science Vol. 174
Database queries with fuzzy linguistic quantifiers
IEEE Transactions on Systems, Man and Cybernetics
On ordered weighted averaging aggregation operators in multicriteria decisionmaking
IEEE Transactions on Systems, Man and Cybernetics
Weighted fuzzy pattern matching
Fuzzy Sets and Systems - Mathematical Modelling
Aggregates in possibilistic databases
VLDB '89 Proceedings of the 15th international conference on Very large data bases
Measuring properties of fuzzy sets: a general technique and its use in fuzzy query evaluation
Fuzzy Sets and Systems - On fuzzy information and database systems
Fuzzy measure of fuzzy events defined by fuzzy integrals
Fuzzy Sets and Systems
SQLf: a relational database language for fuzzy querying
IEEE Transactions on Fuzzy Systems
Information Processing and Management: an International Journal - Special issue: Cross-language information retrieval
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This paper is situated in the area of flexible queries addressed to regular relational databases. Some works have been carried out in the past years in order to design languages allowing the expression of queries involving preferences through the use of fuzzy predicates. In the relational setting, extensions of the relational algebra as well as of SQL-like languages have been proposed and a wide range of fuzzy queries has been made available. However, the use of conditions involving an aggregate function applying to a fuzzy set is not yet possible except for the cardinality (count) in the context of the so-called fuzzy quantified statements. The objective of this paper is to investigate how (and under which conditions) other aggregate functions (such as the maximum...) could be applied to fuzzy sets in a flexible query.