实体关联模型 实体关联资料模型(E-R Data Model) 有 三个组成元件 实体集(Entity Sets) 属性栏位(Attributes) 关联集(Relationship Sets)。
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The logic framework structured design is consisted of theory analysis of function dependency, relation normalization, transformation from E-R model to relation model and data model normalization.
逻辑结构设计包括函数依赖和关系规范化的理论分析、E - R模型向关系模型的转换和数据模式规范化。
Some basic concepts of E-R relation model and multi-dimension data model are introduced, and design of multi-dimension data model of demand management is described in detail.
本文介绍了E R关系模型和多维数据模型的一些基本概念，着重介绍了需求管理的多维数据模型设计。
After the analysis of system function and business, this paper designs the database E-R model and logical data model of this system.
在分析了系统业务和功能之后，设计了系统数据库的E - R模型及逻辑数据库模型。
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