递归维概念及其操作的研究  

The Concept of Recursive Dimension and Corresponding Operations

作　　者：袁霖[1] 李战怀[1] 徐秋元 

机构地区：[1]西北工业大学计算机系,西安710072

出　　处：《计算机科学》2003年第10期7-10,20,共5页Computer Science

基　　金：国家自然科学基金(60073055);西北工业大学博士论文创新基金

摘　　要：1.引言 数据仓库技术研究如何将分散在企业内部多个异构数据源的操作型数据,经过抽取、清洗转换、集成,以一致的方式进行存储.其实现多基于关系技术,数据被分别存放在维表和事实表之中,以星型或雪花模式存储.Dimensions are an essential part in multi-dimensional data model (MDDM) for OLAP. Hierarchical structure of dimension allows the user to study measures in different levels of details. This paper focuses on a special kind of dimension with an unbalanced-hierarchy designed to support self-referencing dimension table in data warehouses, called recursive dimension, which is largely ignored by research area. So we extend MDDM to represent it and corresponding operations. Finally we show how it can be implemented in object-relational DBMS environment.

关 键 词：数据仓库 递归维概念 操作 多维数据模型 数据库 数据集 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]