A data base is a collection of data organized in a manner which allows retrieval and use of that data. A data base consists of one or more files. A file is a collection of related data. Data base software allows the user to organize the data in the manner required for the application，allows retrieval of that data，and also allows the user to easily add，delete，or change data in the data base.
数据库就是以允许检索和使用数据方式而组织的数据集合。数据库是由一个或多个文件组成。文件是相关数据的集合。
数据库软件允许用户按应用要求组织数据，允许检索数据，也允许用户方便地在数据库中添加、删除或修改数据。