实体-关系代数

1984 IEEE First International Conference on Data Engineering Pub Date : 1984-04-24 DOI:10.1109/ICDE.1984.7271312

C. Parent, S. Spaccapietra

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引用次数: 30

摘要

本文定义了一个实体关系数据库操作的代数。通过与关系型数据操作语言中通常的完备性定义等价，我们说代数是完备的。这项工作旨在为完整实体-关系dml的定义提供良好的基础，这是使ER模型完全可操作的基本特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An entity-relationship algebra

This paper defines an algebra for the manipulation of an entity-relationship data base. The algebra is said to be complete through equivalence with the usual definition of completeness for relational data manipulation languages. This work is intended to provide a sound basis for the definition of complete entity-relationship DMLs, an essential feature to make the ER model fully operational.

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1984 IEEE First International Conference on Data Engineering

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