數(shù)據(jù)庫系統(tǒng)[外文翻譯]


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數(shù)據(jù)庫系統(tǒng)
用于描述文件和數(shù)據(jù)庫的概念相同結(jié)構(gòu)中有各種各樣的實質(zhì)區(qū)別。
一個數(shù)據(jù)庫可以被定義成一個互相聯(lián)系數(shù)據(jù)的集合，這個集合有很小的復雜，盡可能的為一個或多個應用程序在最理想的方式下服務，存貯數(shù)據(jù)的目的是使他們與用數(shù)據(jù)的程序獨立，一種相同的控制方法用在數(shù)據(jù)庫內(nèi)嗇新數(shù)據(jù)和修改，恢復已存在的數(shù)據(jù)，如果一個系統(tǒng)在結(jié)構(gòu)上完全分離，則他們被稱為一個數(shù)據(jù)庫集合。
一個數(shù)據(jù)庫呵以設計為批處理，實施處理或連機數(shù)據(jù)處理，一個數(shù)據(jù)庫系統(tǒng)包括應用程序，數(shù)據(jù)庫管理系統(tǒng)和數(shù)據(jù)庫。
大多數(shù)數(shù)據(jù)庫的最主要特點之一是他們需要不斷的更新和增加。當數(shù)據(jù)類型和應用被增加時，的簡單重構(gòu)必須是可能的，重組織應當不用重新寫應用程序，總體上應當盡可能是小的變化，這種不費力的改變數(shù)據(jù)庫將在數(shù)據(jù)處理的速度上產(chǎn)生很大的影響 ......



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 ......