摘要
根据时态关系规范化理论,对HRDB提出一种基于TempSQL模型的关系模式分解方法。在满足元组同时性和时态联接性的时态约束下,将HRDB按属性集投影或按时间区间进行分解,以解决冗余和数据膨胀的问题。
According to the normalization theory on temporal relationship, a method of schema decompositions of relationship mode to HRDB based on TempSQL model is created. With the temporal restriction about simultaneity in a record and temporal coupiing, HRDB is decomposed in terms of projection by properties set or time period in order to eliminate the redundancy and expansion of data.
出处
《计算机与现代化》
2009年第6期16-20,共5页
Computer and Modernization
基金
深圳市科技计划资助项目(06KJce037)
