曾平. 数据库逻辑设计的E-S-C转换方法[J]. 武汉大学学报 ( 信息科学版), 1994, 19(2): 178-183.
引用本文: 曾平. 数据库逻辑设计的E-S-C转换方法[J]. 武汉大学学报 ( 信息科学版), 1994, 19(2): 178-183.
Zeng Ping. The E-S-C Transformation Method of Logic Database Design[J]. Geomatics and Information Science of Wuhan University, 1994, 19(2): 178-183.
Citation: Zeng Ping. The E-S-C Transformation Method of Logic Database Design[J]. Geomatics and Information Science of Wuhan University, 1994, 19(2): 178-183.

数据库逻辑设计的E-S-C转换方法

The E-S-C Transformation Method of Logic Database Design

  • 摘要: 本文提出了一个基于实体-联系模型(ERM)的数据库逻辑设计方法,即由EERM到SERM,SERM到CERM的转换方法,简称H-S-C方法。首先介绍了一个扩充实体-联系模型(EERM),定义了简单实体-联系模型(SERM)及规范实体-联系模型(CERM),然后给出了EERM到SERM,SERM到CERM的等价转换规则。

     

    Abstract: In this paper,a method of logic database design-E-S-C transformation method is presented, which is based on entity-relationship model. Each step of the method can be implemented by algorithm,which is convenient for developing logic database system. An extended entity-relationship model is discribed,and a simple entity-relationship model and a Canonical entity-relationship model are defined. The transformation rules from extended entity-relationship model to simple entity-relationship model is given, then the transformation rules from simple entity-relationship model to canonical entity-relationship model. An automatic tool of logic database design using E-S-C method has been developed.

     

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