| 基于TempSQL模型时态约束的HRDB模式分解方法 |
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| 引用本文： | 曾煌兴,温晓军.基于TempSQL模型时态约束的HRDB模式分解方法[J].计算机与现代化,2009(6). |
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| 作者姓名： | 曾煌兴 温晓军 |
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| 作者单位： | 深圳职业技术学院电信学院,广东,深圳,518055 |
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| 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.
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| 关 键 词： | TempSQL模型 时态约束 模式分解 |
A Method of Schema Decompositions of HRDB Based on TempSQL Model with Temporal Restriction |
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| ZENG Huang-xing,WEN Xiao-jun.A Method of Schema Decompositions of HRDB Based on TempSQL Model with Temporal Restriction[J].Computer and Modernization,2009(6). |
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| Authors: | ZENG Huang-xing WEN Xiao-jun |
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| Affiliation: | School of Electronics & Information Engineering of Shenzhen Polytechnic;Shenzhen 518055;China |
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| Abstract: | 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 coupling,HRDB is decomposed in terms of projection by properties set or time period in order to eliminate the redundancy and expansion of data. |
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| Keywords: | HRDB |
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