| E-R图向关系模型转换不一致性的研究 |
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| 引用本文： | 廖飒.E-R图向关系模型转换不一致性的研究[J].柳州职业技术学院学报,2005,5(3):106-109. |
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| 作者姓名： | 廖飒 |
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| 作者单位： | 武汉理工大学计算机学院,湖北,武汉,430070 |
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| 摘 要： | 在E-R图向关系模型转换过程中,用转换规则得到的候选码与用候选码定义得到的候选码有时会不一致.本文探讨了转换规则在什么情况下会产生这种不一致的现象,并给出相应的处理措施.
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| 关 键 词： | 实体 联系 关系模式 候选码 |
| 文章编号： | 1671-1084(2005)03-0106-04 |
| 收稿时间： | 06 25 2005 12:00AM |
| 修稿时间： | 2005年6月25日 |
The Research of Conversion Rules from Entity-Relationship Diagram into Relation Model |
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| LIAO Sa.The Research of Conversion Rules from Entity-Relationship Diagram into Relation Model[J].Journal of Liuzhou Vocational & Technical College,2005,5(3):106-109. |
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| Authors: | LIAO Sa |
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| Institution: | Computer College of WuHan University Of Technology, Wuhan Hubei 430070 |
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| Abstract: | Candidate keys from conversion rules sometimes are different from candidate keys from definition of candidate key in the process of converting Entity - Relationship Diagram into Relation Model. This paper makes a further research on in which condition that conversion rules lead this difference and gives the Corresponding measure. |
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| Keywords: | entity relationship relation schema candidate key |
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