Partially silvered mirror splitter locally distributed data base system 局部镀银镜式分离器局部分布式数据库系统
This text will take distributed data base system of medical procurement as an example, brief to introduce distributed to inquire about goal that optimize, tactics and on the basis of relation algebra optimization algorithm that equivalence varied. 本文将以分布式的药品采购数据库系统为例,简要介绍分布式查询优化的目标、策略及基于关系代数等价变换的优化算法。
Methods: The distributed data base system was composed of three software which were patients satisfactory scale, evaluation software in hospital and statistical query module and values in the system were assigned according to the managing oriented theory and the statistical demand. 方法:采用分布式数据库,由住院病人满意度评分软件、院内评分软件及统计查询模块三部分组成。
In the extensive distributed data base system, the data base duplication plays a very key role to the dependability and efficiency of the system. 在大规模的分布式数据库系统中,数据库复制对于系统的可靠性及效率起着非常关键的作用。
According to CAX method, many distributed heterogonous data sources can be integrated to an extended multi data base system. 该方法主要用于在一个扩展的多数据库系统中集成多个分布异构数据源。
By using techniques of multiple distributed data base, the article defines the function and distribution necessity of logistics Distribution management system and give a multiple distributed analysis and designs to the system and the data base. 本文于借助分布式数据库技术,在确定物流管理系统的功能需求和分布要求基础上,对物流配送管理系统的数据库进行分布式分析和设计。
Application of Semi-join Operation Inquiry Optimized in Distributed Data Base System 半联接查询优化在分布式数据库系统中的应用
The Design of Distributed Geographic Relation Data Base Management System The Research on FLIC Files Data Structure and its Display Software 分布式图文数据库系统DGRDBMS的设计一种图文数据库系统的设计与实现