The requirements are analysed in chapter 2, then the database design which includes conceptual and logical design are introduced in detail in chapter 3.
第3章介绍系统设计，详细介绍了图书馆系统的数据库设计，给出了概念模型和逻辑模型。
A longstanding and common design pattern for data modeling is the division of the data model into three parts: a conceptual model, a logical model, and a physical model.
数据建模中一种常见并被长期使用的设计模式是将数据模型分为三部分：概念模型、逻辑模型和物理模型。
The design of the risk database, including conceptual model and logical model, was described in details.
文章对数据库的概念模型、物理模型设计工作进行了详细描述。
Narrow sense database design includes three stages: Conceptual design, logical design and physical design. This article discusses how to optimize the database performance on the three stages.
狭义数据库设计包括三个阶段：概念设计、逻辑设计和物理设计，故从这三个阶段探讨如何优化数据库的性能。
Narrow sense database design includes three stages: Conceptual design, logical design and physical design. This article discusses how to optimize the database performance on the three stages.
狭义数据库设计包括三个阶段：概念设计、逻辑设计和物理设计，故从这三个阶段探讨如何优化数据库的性能。
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