Title :
Fuzzy functional dependency and its application to approximate data querying
Author :
Intan, Rolly ; Mukaidono, Masao
Author_Institution :
Dept. of Comput. Sci., Meiji Univ., Kanagawa, Japan
Abstract :
Reviews a new definition of fuzzy functional dependency based on conditional probability and its application to approximate data reduction related to the operation of projection in classical relational databases in order to construct fuzzy integrity constraints. We introduce the concept of partial fuzzy functional dependency, which expresses the fact that a given attribute X does not determine Y completely, but in the partial area of X it might determine Y. Finally, we discuss another application of fuzzy functional dependency in constructing fuzzy query relations for data querying and approximate joins of two or more fuzzy query relations in the framework of an extended query system
Keywords :
data reduction; database theory; fuzzy set theory; query processing; relational databases; approximate data querying; approximate data reduction; approximate joins; conditional probability; extended query system; fuzzy integrity constraints; fuzzy query relations; partial fuzzy functional dependency; projection; relational databases; Application software; Computer science; Data mining; Fuzzy sets; Fuzzy systems; Relational databases;
Conference_Titel :
Database Engineering and Applications Symposium, 2000 International
Conference_Location :
Yokohama
Print_ISBN :
0-7695-0789-1
DOI :
10.1109/IDEAS.2000.880561
