【摘要】 数据仓库概念模型设计是数据仓库设计和实施的基础,是决定数据仓库成功与否的关键之一。该文介绍了一种数据仓库的概念模型-样本模型,它以事件为中心组织实体,并给出了描述实体之间层次、分类、组合关系的方法,以及确定样本库模式的原则和方法。最后给出了从ER模型向样本模型转换的方法。更多还原

【Abstract】 The conceptual model is the basis of the data warehouse design and imp le mentation,it is one of the key fac-tors that can determine the success or fail ure of data warehouse project.This paper introduces a conceputal model of data warehouse-sample model,which organizes entities by events.It firstly discusse s the method used to describe the hi-berarchy,classification and combination r elationship between entities;then,introduces the method and rule used to deter-mine the schema of sample model;finally,gives the method used to convert ER model to sample model.更多还原