In this paper,based on rough set theory and relational database,the relationship between rough relational database and fuzzy relational database is analyzed systematically from functional dependency,normal form and Armstrong axiom.

• 以粗糙集理论(Rough Set Theory)和关系数据库理论为基础,从函数依赖、范式理论、Armstrong公理等方面系统地研究了粗糙关系数据库(Rough Relational DataBase,简称RRDB)与模糊关系数据库(Fuzzy Relational DataBase,简称FRDB)之间的关系。