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- W2389295931 abstract "Based on vague set theory,the vague relational database which is the same as the fuzzy database,has a canonical interpretation as a set of regular databases because of the fuzzy information it contains.While such databases can be more truly reflect the real world,it is well known that their manipulations raise a number of problems,in particular with respect to the soundness of querying operations and the complexity of the evaluation process.In this paper,based on the vague relational data model,a query language including three operators such as selection,projection and join is explored.The problems exiting in the query language for the general vague relational data model are pointed out.In order to solve the problems,the vague relational data model is further extended through introducing a nesting mechanism.Finally,three operators in the query language are discussed in different situations and the corresponding definition is given." @default.
- W2389295931 created "2016-06-24" @default.
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- W2389295931 date "2008-01-01" @default.
- W2389295931 modified "2023-09-28" @default.
- W2389295931 title "Vague Databases Based Algebraic Query Language" @default.
- W2389295931 hasPublicationYear "2008" @default.
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