关系模型到ER模型的转换研究

The Research on The Transformation from Relational Model to ER Model

论文结合具体事例,分析了数据库领域内最常用的ER模型和关系模型,并详细介绍了从关系模型到ER模型的转换算法。算法的关键是通过牺牲时间复杂度的代价,遵循特定的转换顺序,将关系数据库中的各种关系以及关系之间的外键属性转换成ER模型中的各种实体与属性。经过研究表明,本文介绍算法对未来的计算机程序进行自动化转换有重要的指导意义。

In the paper,the research is made on the subject of transformations from Relation Model to ER Model,with promoted algo- rithms. At the expenses of the space complexity,the algorithm introduced in this paper aims to transform the different relations and for- eign keys in Relation Model to specific attributes and entities in ER Model. It shows the algorithm in this paper has a great impact on the automatic transformations in the future.