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The determining method about the conflict between the null constraints and the set of functional dependencies

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Abstract

In this paper the conflict between the null constraints and the set of functional dependencies is defined. Some rules for determining the conflicts and a method for processing the conflicts are obtained.

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References

  1. D. Maier, The Theory of Relational Databases, Computer Science Press, Rockville, Md., 1983.

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  2. Ding Baokang. The semantics of null values and the relationship between databases and universal relations,Chinese Journal of Computers,8:4 (1985).

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  3. J.D. Ullman, Principles of Database System, Computer Science Press, Potomac, Md., 1983.

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Authors and Affiliations

  1. Yunnan University, Yunnan, China

    Liu Weiyi

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  1. Liu Weiyi
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Liu, W. The determining method about the conflict between the null constraints and the set of functional dependencies. J. of Comput. Sci. & Technol. 4, 116–125 (1989). https://doi.org/10.1007/BF02943359

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  • DOI: https://doi.org/10.1007/BF02943359

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