对象类视图中蕴涵的依赖关系

DATA DEPENDENCIES IN RELATIONAL VIEW REPRESENTING AN OBJECT CLASS

本文研究关系模型中对象类视图关系模式的数据依赖问题。关系数据库中用一组表存放一个对象类的数据,并用视图实现对象类。本文分析该视图的列之间存在的函数依赖和多值依赖,并证明了类的所有单值和多值属性组成对象标识的多值依赖基。

This paper studies the problem of data dependencies in relational scheme of object class view, and verifies that a multivalued dependency basis of oid consists of all class attributes in object class view.