数据库系统[外文翻译].doc

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数据库系统[外文翻译],中文6500多字7页英文1.9万字符7页数据库系统用于描述文件和数据库的概念相同结构中有各种各样的实质区别。一个数据库可以被定义成一个互相联系数据的集合,这个集合有很小的复杂,尽可能的为一个或多个应用程序在最理想的方式下服务,存贮数据的目的是使他们与用数据的程序独立,一种相同的控制方法用在数据库内...
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数据库系统[外文翻译]


中文 6500多字 7页
英文 1.9万字符 7页

数据库系统
用于描述文件和数据库的概念相同结构中有各种各样的实质区别。
一个数据库可以被定义成一个互相联系数据的集合,这个集合有很小的复杂,尽可能的为一个或多个应用程序在最理想的方式下服务,存贮数据的目的是使他们与用数据的程序独立,一种相同的控制方法用在数据库内啬新数据和修改,恢复已存在的数据,如果一个系统在结构上完全分离,则他们被称为一个数据库集合。
一个数据库呵以设计为批处理,实施处理或连机数据处理,一个数据库系统包括应用程序,数据库管理系统和数据库。
大多数数据库的最主要特点之一是他们需要不断的更新和增加。当数据类型和应用被增加时,的简单重构必须是可能的,重组织应当不用重新写应用程序,总体上应当尽可能是小的变化,这种不费力的改变数据库将在数据处理的速度上产生很大的影响 ......



Database system
The conception sued for describing files and databases has varied substantially in the same organization.
A database may be defined as a collection of interrelated data stored together with as little redundancy as possible to serve one or more applications in an optimal fashion; the data are stored so that they are independents of programs which use the data; a common and controlled approach is used in adding new data and in modifying and retrieving existing data within the data base one system is said to contain a collection of databases if they are entirely separate in structure.
At abase may be designed for batch processing, real-times processing, or in-line processing. a data base system involves application program, DBMS and database.
One o he most important characteristic of most databases is that they will constantly need to change and grow easy restructuring of the database must be possible as new data types and new applications are added.
The restructuring should be possible without having to rewrite the application program and in general should cause as little upheaval as possible the ease with which a database can be changed will have a major effect on the rate at which data-processing application can be developed in a corporation ......