摘要
在数据库建模过程中,在一个关系数据库系统中将概念模式映射为关系模式时,往往需要借助规范化方法来消除可能的冗余。文中讨论了闭包算法在函数依赖投影求解以及基于BCNF的关系分解中的应用。
In the database modeling process, when the conceptual model will be mapped to the relational model, in a relational database system, it is often necessary to eliminate possible redundancy according to the standardized methods. The article discussed the applications of the closure algorithm to solve the problem of the functional dependency projection, and the relation decomposition based on BCNF.
出处
《电脑知识与技术》
2009年第3X期2066-2067,共2页
Computer Knowledge and Technology
关键词
闭包
关系模式
BCNF
函数依赖
关系分解
closure
relation mode
BCNF
functional dependency
relation decomposition