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dmGQL:一种新的数据立方梯度查询语言

dmGQL:A New Query Language of Cube Gradient
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摘要 现有数据立方梯度查询语言CubegradeQL主要是针对非实例化数据立方的,实际上,为了提高OLAP查询效率,数据仓库中往往保存了大量实例化的数据立方。本文我们改进了CubegradeQL语言,给出了一个新的查询语言dmGQL,dmGQL能够支持实例化/非实例化数据立方中的梯度查询,最后,我们讨论了dmGQL的查询处理。 The existing data cube gradient query language CubegradeQL mainly performs on the non-materialized cube. In fact, in order to the request time of OLAP query, data cube is always computed (i. e. , materialized )in data warehouse. In this paper, we present an improved query language dmGQL that can support the query on materialized/lion- materialized cube. Finally, the query processing of dmGQL is discussed.
作者 刘玉葆 冯玉才
机构地区 华中科技大学计算机科学与技术学院
出处 《计算机科学》 CSCD 北大核心 2004年第3期86-88,98,共4页 Computer Science
基金 "十五"科技部攻关项目资助(No.2001BA110B01)
关键词 数据库管理系统 数据挖掘 dmGQL 数据立方梯度查询语言 概率规则 数据仓库 Data cube > Data cube gradient, Data mining query language
分类号 TP311.131 [自动化与计算机技术—计算机软件与理论]
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参考文献6

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二级参考文献10

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