摘要
关系模式规范化是关系数据库逻辑设计的重要步骤。按关系模式的范式定义进行规范化,其理论过于抽象,与应用存在较大差距,不便于操作。提出了一种以函数依赖与或图为基础的图示化关系模式规范化方法。利用这种方法进行关系模式分解,具有分解过程直观、易操作和效率高等特点。
The normalization of relation schema is very important to the logical design of relation databases.However,there are some problems in normalization with the definition of pattern in relation schema,for instance,its theory is so abstract that its application is far behind the development of theory and hard to put into practice.This paper brings forward a method of graphical standardization of relation schema based on function dependence hypergraph.with this method,the analysis of relation schema becomes intuitionistie in process, easy to operate and highly efficient.
出处
《淮南师范学院学报》
2009年第5期129-131,共3页
Journal of Huainan Normal University
关键词
函数依赖与或图
关系模式
规范化
function dependence hypergraph
relation schema
normalization
