数据库中有关的主要概念，然后回顾数据管理技术的三个发展阶段，数据库的三个发展阶段及各阶段的主要特点，掌握数据库中的有关的基本概念、数据库系统的组成及各部分的主要功能。重点掌握实体、属性定义和实体型之间的联系类型及特点。三种数据模型的特点及区别。面向对象数据模型的基本特征。-Databases on the main concepts, and then review data management techniques to the three stages of development, database development phase and the phase of the three main features to master database on the basic concepts, database system, an integral part of the main functions of the various . Master key entities, attributes and entity type defines the link between the type and characteristics. Three kinds of data model features and differences. Object-oriented data model basic features.