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A study of fuzzy query systems for relational databases

In many cases information is found to be naturally fuzzy or imprecise, that's why fuzzy query systems have become indispensable to represent and manage this information and especially facilitate interrogation to a non-expert user. In this paper, we present a brief study of fuzzy querying relational databases, we start by the design and operation of a fuzzy system, and we present different types architectures of fuzzy interrogation systems of database. Finally, a comparison of most relevant characteristic in fuzzy query systems of database is included in this work, as well.