Then , we compare the different among rdbms , oodbms , ordbms . after analyzing the concepts of ordbms , we put emphasis on the study how to store and manipulate these complex objects which include user " s types and how to realize them on the prototype of ordbms designed by us 在充分介绍了ordbms的概念后，我们着重研究了包含用户定义类型的复杂对象在对象-关系数据库系统中是如何存储和操纵的，并在我们构造的ordbms原型系统上予以实现。
Considering the superiority of the completely relational database management of spatial data and attribute data , we adopted the spatial data engine to combine the map special data of the forest resource information with the relationship database system , and realized the management and service of data after designing the attribute data form and special data form in detail 考虑到空间数据和属性数据的全关系型数据库管理的优越性，采用空间数据引擎技术，将森林资源信息数据库中所包含的地图空间数据存储到关系数据库系统中，对属性数据表和空间数据表进行了详细设计，实现数据的管理与维护。
Most relational database systems , such as microsoft sql server , intrinsically support transactions by providing locking , logging , and transaction management facilities for implicit transactions , which occur whenever a client application performs an update , insert or delete operation 大多数关系数据库系统（例如microsoft sql server ）都通过为隐式事务（只要客户端应用程序执行了更新、插入或删除操作，就可能发生隐式事务）提供锁定、记录和事务管理功能，从内部支持事务。
A windows oriented grid resource sensor service is designed and implemented with wmi technology , and the archive services and directory services in each layer are implemented with relational database and multi - thread approach . the paper also discusses the hierarchical management and backup mechanism of directory service and proposes an approach by distributing them to different layers . finally , we implement a general grid resources information service system on windows platform 然后基于gma体系结构提出了一种对网格资源信息进行层次化组织管理的方法,基于wmi技术设计实现了windows环境下的资源信息传感器服务,基于关系数据库系统和多线程技术设计实现了不同层次的归档服务和目录服务,并通过对各级归档服务和目录服务的分布式组织,研究与提出了一种目录服务的分层管理与备份机制。
As the rdbms ( relational database system ) can hardly adapt the requirement of non - traditional application , such as incompetence of model representation , low system with a combination of 00 language , sematic , model , complex object and database system . it absorts the merit of the oodbms and the rdbms , it inherit the mature technology of the rdbms , on the other hand , it import the technology of the 00 , so it can boost up the ability of handle complex object , etc 它针对关系数据库系统( rdbms )不能适应非传统应用的要求，如：模型表达能力有限，系统效率低、事务模型太简单等，结合面向对象语言、语义模型、复杂对象模型和数据库的几个方面的研究而形成的一个高度数据集成化系统。
It absorts the merit of oodbms and rdbms , it inherits the mature technology of rdbms . on the other hand , it imports the technology of 00 , so it can boost up the ability of handle complex object , etc . so , we can say ordbms is a new generation of database system , it is the next tidal wave of the database system developing 对象-关系数据库系统结合了面向对象数据库系统和关系数据库系统两者的优点，既继承了关系数据库系统本身成熟的技术，同时又将面向对象技术引入到关系数据库系统中，增强了它在处理复杂对象等方面的能力。
The techniques of implementation of the standard data access interface of step based on relational databases are studied in the dissertation . the uniform accessing of the product information is achieved for the distributed and heterogeneous systems . used by the techniques , the issues of the product information integration between enterprises or in the interior of enterprises will be resolved in effect 本文对step标准数据访问接口的关系数据库实现技术进行了研究，在产品生命周期内，以支持异构系统对所有产品数据信息的基于关系数据库系统的访问，有效地实现对产品数据信息的共享。
Virtual ontology data source shields the detail of low - leveldatasource , andprovides aconsistentaccessinterfacefortopperusers . wediscussedthemethodof transforming relation database to virtual ontology data source ( which is also called databasedeep annotation ) . we designed the database schema description language and mapping rulesdescriptionlanguage , andgavearesolventforrelationmodeling . at last , we bring out a framework of general natural language interface , and implement adatabasenaturallanguageinterface . makinguseofaspecificexample , wemadeanevaluationofthissystem 我们具体讨论了从关系数据库系统到虚拟本体数据源的转换(也称为数据库深度注解) ,定义了关系数据库的结构知识描述语言和通用的映射规则描述语言,给出了多元关系建模的解决方案。
Query demand varies with different operation range , thus query function must be general and flexible . accordingly , one kind of object - oriented design model and an implement method of general query component are introduced in the thesis . the component can be applied not only in finance and revenue interlink , but also in other relational database system 查询需求是随着业务处理范围不同而变化的，对查询功能的通用性和灵活性有较高的要求，所以本文依据面向对象思想设计出报表通用查询组件，此组件不仅可以应用于财税联网系统，而且可以很方便的应用于其他关系数据库系统。
The history of the development of database technology can be divided into three phases : the first generation is the reticulation / hierarchical data model based on database ; the second generation is the relational data model based database ; the third generation database which has the object oriented character breakthroughs the localization of the traditional database model which is unable to build model based on complex data structure . the third generation has led the database system to a new time 数据库技术的发展经历了三个阶段：第一代数据库系统是基于网状、层状数据模型的网状、层状数据库管理系统；第二代数据库是基于平面关系模型的关系数据库系统；以面向对象模型为代表的第三代数据库系统突破了传统数据模型在复杂数据建模和管理方面存在的局限性，使数据库系统进入了新的时代。
