关系数据库中FD集的归并依赖集的性质

The Properties of Merger-Dependency Set of FD Sets in Rational Database Schemes

从讨论两个归并依赖之间的关系入手，给出了归并依赖集左部之间的嵌入关系，以及归并依赖集的若干性质。这在无环数据库模式分解时是有用的。

From the relationship betWeen two meader-dependencysets, this paper presentS the inlaying-relationship betWeen tWo leftparts of meopr dependencies and several propertiesofthe meader-de-pendency set.These are useful in the decomPOsition of the acyclicdatabase schemes.