二层和三层客户用艮务器数据库系统的比较研究

Comparison Between Two-tier＆Three-tier Client/Server Database System

本文主要介绍了数据库系统体系结构的历史变迁，二层和三层客户／服务器数据库的各自特点、优缺点，其中对两者作了比较，分析了三层客户/服务器中十分重要的一部分——中间件。

This paper mainly presents the historical development of the construction of Database system and the characteristics of two-tier and three-tier client/server database, then makes a comparison between them and analysis a important part of three-tier client/server----middleware.