The logical model of the database is simply a representation of all the data requirements of the user, put into a normalized form.
数据库的逻辑模型仅仅是对用户的所有数据需求的一种表示，它将这些需求变成一种范式。
You can easily create a logical data model that is derived from business requirements and transform that into a physical data model that reflects your database design.
可以从业务需求轻松地创建逻辑数据模型，并把它转换为反映数据库设计的物理数据模型。
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。
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。
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