南華大學機構典藏系統:Item 987654321/23550
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    题名: An Efficient Method for Estimating Null Values in Relational Databases
    作者: 王佳文;Wang, Jia-Wen;Cheng, Ching-Hsue
    貢獻者: 電子商務管理學系
    关键词: Relational database systems;Null value;Degree of influence
    日期: 2007-08
    上传时间: 2015-10-05 17:09:17 (UTC+8)
    摘要: Generally, a database system containing null value attributes will not operate properly. This study proposes an efficient and systematic approach for estimating null values in a relational database which utilizes clustering algorithms to cluster data, and a regression coefficient to determine the degree of influence between different attributes. Two databases are used to verify the proposed method: (1) Human resource database; and (2) Waugh's database. Furthermore, the mean of absolute error rate (MAER) and average error are used as evaluation criteria to compare the proposed method with other methods. It demonstrates that the proposed method is superior to existing methods for estimating null values in relational database systems.
    關聯: Knowledge and Information Systems
    vol. 12, no. 3
    pp.379-394
    显示于类别:[電子商務管理學系(停招)] 期刊論文

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