Application of Fuzzy Query Based on Relation Database
The traditional query in relation database is unable to satisfy the needs for dealing with fuzzy linguistic values. In this paper, a new data query technique combined fuzzy theory and SQL is provided, and the query can be implemented for fuzzy linguistic values query via an interface to Microsoft Visual Foxpro. Here, the authors applied it to a realism instance, questions could be expressed by fuzzy linguistic values such as young, high salary, etc, in Employee relation database. This could be widely used to realize the other fuzzy query based on database.