期刊名称：International Journal of Computer Science and Management Studies
电子版ISSN：2231-5268
出版年度：2013
卷号：13
期号：2
出版社：Imperial Foundation
摘要：Traditional database systems can deal with perfect data. But lot of information is present in imperfect form due to vagueness or imprecision. [16] Fuzzy set theory has been applied to deal with imperfections of data and to enhance the accessibility of databases. When users work with usual software tools they have to change their many valued logical thinking (approximate reasoning) into the two-valued computer logic.[5]Structured Query Language (SQL) is a very powerful tool, it satisfy needs for data selection based on degree of truth with linguistic expressions . As flexible querying that is based on fuzzy set theory, Medina et al. have developed a server named fuzzy SQL, which supports flexible queries based on GEFRED model. A new architecture of fuzzy DBMS shows the concept of weak coupling with the DBMS SQL Server. Recent studies shows that time cost and resources can be saved by converting fuzzy queries into SQL queries.
