A generalized SQL query construct for paraconsistent intuitionistic fuzzy databases

Recently, the paraconsistent intuitionistic fuzzy relational data model has been developed for representing and manipulating three kinds of uncertain information in databases: fuzzy, incomplete and inconsistent. The model is based on infinite-valued relations, called paraconsistent intuitionistic fuzzy relations. Here, we present an SQL-like SELECT statement construct for posing queries to paraconsistent intuitionistic fuzzy databases based on this model. The syntax of our generalized SELECT statement is similar to that of the usual SELECT statement of SQL, but its semantics is based on infinite-valued logic, making it an effective tool for querying paraconsistent intuitionistic fuzzy databases.