Data quality model and selection quality propagation for relational database

Computer Engineering and Applications ›› 2007, Vol. 43 ›› Issue (27): 1-3.

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Data quality model and selection quality propagation for relational database

CHEN Wei-dong,ZHANG Wei-ming

School of Information System and Management National University of Defence Techaology,Changsha 410073,China

Received:1900-01-01 Revised:1900-01-01 Online:2007-09-21 Published:2007-09-21
Contact: CHEN Wei-dong

数据质量模型及选择运算中的质量传播研究

陈卫东,张维明

国防科技大学信息系统与管理学院,长沙 410073

通讯作者: 陈卫东

Abstract

Abstract: The paper presents a data quality assess model for relational database and defines the accuracy metric at attribute level.After analyzing the difference between the error rate before and after quantization,the relationship is presented.The paper also discusses the quality propagation of the selection operation of relational algebra on key attribute,and proves that the accuracy is equal in theory,and represents the propagation formula with error rate before and after quantization separately.

Key words: data quality, data quality model, quality propagation, relational algebra, accuracy

摘要： 针对数据库数据质量评价问题,给出了一个属性粒度的质量评价模型,定义了正确性评价指标。在分析量化前后属性错误率的基础上,给出了两种错误率之间的关系。还研究了关系代数选择运算在键属性条件下的质量传播关系,得出了选择运算前后正确性不变的结论,并分别用属性量化前后错误率进行了表示。

关键词: 数据质量, 数据质量模型, 质量传递, 关系代数, 正确性

CHEN Wei-dong,ZHANG Wei-ming. Data quality model and selection quality propagation for relational database[J]. Computer Engineering and Applications, 2007, 43(27): 1-3.

陈卫东,张维明. 数据质量模型及选择运算中的质量传播研究[J]. 计算机工程与应用, 2007, 43(27): 1-3.

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Data quality model and selection quality propagation for relational database

数据质量模型及选择运算中的质量传播研究

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