Through initial development and application , the oracle distributed database system can meet the basic theoretical design requirement . the results of trial operation indicate that the plan to establish distributed database in intelligent building oa system is practical and has great application and development prospects 通过初步的开发和应用，所设计的oracle分布式数据库系统基本上达到了理论设计要求，运行结果表明，用oracle建立智能大厦oa系统的分布式数据库方案是切实可行的、并具有良好的应用和发展前景。
First this thesis introduces the concept and theory of distributed db and gives a deep discussion about data fragment ， distribution and db connection etc . base on distributed db system which takes the c / s cooperated distributed db constructed by using sybase in some finance bureau as an example . it also analyses the development tendency of from two - layer to three - layer or more layers architecture model ( including object / component technology ) based on web 本论文首先介绍分布式数据库系统的有关概念和理论，以某财政局使用sybase建立的客户机/服务器模式的协作式分布式数据库系统为例，就分布式数据库系统、数据分片、分布技术及数据库连接等问题进行深入的研究探讨。同时分析了web三层乃至n层（包含对象/组件技术）结构模式的发展状况。
Firstly , we analyse the development of the computing , the renovation of client / server computing , the middleware in classification and the multi - tiers distributed computing on the web . secondly . we study r the architecture of the distributed database system and the target of constructing a distributed database . we hole up the new architecture - - webddbas for the new demand of the enterprise - level application system and discuss the main function of each level in the webddbas . we describe the distributed object technology and how to realize the function of each level in the webddbas . finally . we shou an application system which is based on the architecture of webddbas through the development of the his 文章首先分析计算模式的发展历程；研究c / s计算模式的“革新”过程；对中间件技术进行分类说明；同时分析多层分布式web模型；接着分析分布式数据库系统体系结构和组成成分以及分布式数据库设计目标；通过企业应用系统的新需求提出构架webddbas ；然后给出webddbas的体系结构，并讨论了各层的主要功能和分布式对象技术以及各层的实现方式；最后通过医院信息系统his建设说明webddbas体系在实际系统开发中的应用情况。
With distributed processing technology extending to database technology from the field of multi - processor system , there is a great upsurge in the research and development of distributed database , as it meets the requirement of the current information system application and caters to the present organizational management mode and concept 近年来，各种各样的新技术应运而生，分布处理的技术也从多个处理机的系统领域渗透到数据库技术中，并掀起分布式数据库研制与开发的热潮。分布式数据库系统符合当今信息系统应用的要求，符合当今企业组织的管理思想和管理方式。
The study of distributed involves the study of distributed processing technology , net work technology and database study , which must be related to solution on some real existent problems . this paper mainly resolves distributed proplem of distributd pdm system , explores a set of schemes of feasible dirtributed database system , and solve problem of production data management in enterprise . main contents as follow : 1 . studying duplicating proplem of distributed database sintem , and giving a general model 分布式数据库系统的研究涉及分布式处理技术、网络技术和数据库技术的研究，而这些研究必须贯穿在对一些现实问题的解决之中。本文将通过对分布式数据库技术、分布式处理技术、网络技术深入研究的基础上，重点解决分布式pdm系统的集成问题，进而探索出一套切实可行的分布式数据库系统的的解决方案，解决现实企业中面临的产品数据管理问题。主要研究内容有： 1
