摘要
针对数据仓库中复杂维结构的特点 ,提出建立基于有向图的维字典图以辅助联机分析中有关维层次的定义 ,并利用维字典图重新定义了数据仓库多维数据模型和关于维层次的重要 OL AP操作 .该方法能够在复杂维层次结构的情况下灵活地适应用户的分析需求 。
In this paper, we introduce the methods to describing the hierarchical structure of dimention in data warehouse using directed graph. We define the Dimentional Dictionary Graph based on some necessary definitions. We extend the definition of multi-dimentional data model using dimentional dictionary graph, and also give two kinds of definitions of some OLAP operations related to hierarchy. Compared with other methods, our definitions make fully use of the complexity of dimention hierarchical structure, thus improve the processing ability of OLAP.
出处
《小型微型计算机系统》
CSCD
北大核心
2003年第9期1641-1645,共5页
Journal of Chinese Computer Systems
关键词
数据仓库
联机分析(OLAP)
多维数据模型
层次
有向图
data warehouse
on-line analysis processing
MultiDimentional data model
hierarchy
directed graph
