Functional Dependencies with Content Null Values in Relational Databases

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概要

• 論文の詳細を見る

• This paper extends the concept of functional dependency in a database in which the presence of context null values is allowed. It is shown that the set of Armstrong's inference rules forms a sound and complete axiom system for functional dependencies with context nulls as well. Some rules for the data update procedures are also introduced and examined to ensure that the database under consideration still satisfies a given set of functional dependencies.

• バイオメディカル・ファジィ・システム学会の論文

著者

• Bui Thi

  Department Of Mathematics Hanoi University Of Sciences

• Nguyn Cat

  Institute Of Information Technology National Center For Science And Technology

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• Functional Dependencies with Content Null Values in Relational Databases

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