完全覆盖在泛关系模式分解和设计中的应用

Applications of Complete Cover in the Decomposition and Design of Relational Schema

本文将关系模式分解得到的一组子模式的属性集看成是与相容类甚至完全覆盖有关的属性集合分解，探讨在一定的条件下，寻找新的子模式的方法，得到一组有用的判定定理结果。

The paper considers attribute subsets of a group of subschemas resulting from the decomposition of a relational schema to be the partition of the compatible classes or complete cover of the relative attribute set. It explores a new method to find a new subschema under certain conditions. A set of useful criterion theorems are obtained.