Some results about the third normal form for relation scheme

Vũ Đức Thi
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Authors

  • Vũ Đức Thi Publishing House for Science and Technology

DOI:

https://doi.org/10.15625/1813-9663/15/1/7754

Abstract

The third normal form (3NF) which was introduced by E. F. Codd is an important normal form for relation schemes in the relational database. It is known [6] that a set of minimal keys of a relation scheme is a Sperner system (some times it is called an antichain) and for an arbitrary Sperner system there exists a relation scheme the set of minimal keys of which is exactly this Sperner system, This paper gives new necessary and sufficient conditions for an arbitrary relation scheme is in 3NF and its set of minimal keys is a given Sperner system.

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Published

18-02-2016

How to Cite

[1]
V. Đức Thi, “Some results about the third normal form for relation scheme”, JCC, vol. 15, no. 1, pp. 62–65, Feb. 2016.

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Section

Computer Science

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