N元关系与关系型数据库

N-ple RELATION AND RELATIONAL DATA BASE

给出了关系数据库模型的数学基本概念 ,如N元关系、N元有序组及N元有序组集合。从N元关系导出关系模型 ,比较了关系模型与N元关系之间的异同 。

The paper introduced the basic conception of math of relation database model,N-ple relation,fordered N-ple and fordered sets.Relation model is derivated from N elements,and the difference and connection between relation model and N-ple relation are also prefered to.