关于Boyce-Codd范式性质的讨论

A Discussion about the Feature of Boyce-Codd Normal Form

本文给出一个关系数据库中关系模式成为Boyce—Codd范式的充要条件及其证明,明确了3NF和BCNF的主要差别—是否存在主属性对任何候选关键字的传递函数依赖性.

This paper gives a relational schema in relational database to form a sufficient and necessary condition and its proof for Boyce-codd normal form.Therefore,it's to make clear thai the main difference between 3NF and BCNF is that whether there is existent the transitive functional depen- dency of the prime attributes on any condidate key or not.