The DBMS is a software tool designed to manage a large number of integrated ,share electronic file cabinets.DBMS是一种软件工具，可用来管理许多综合的、共享的电子“文件柜”。You describe the type of data you wish to store.由你来描述要存储的数据类型，and the DBMS is responsible for creating the database file(s).而DBMS则负责建立数据库文件并提供一种易于使用的机制，and providing an easy to use mechanism for storing ,retrieving and manipulating the data.以便对数据存储、检索和操纵。In small businesses, databases may be both created and operated by the user.在小的企业中，数据库可能是由使用者本人建立和操作。In moderate to large size business with extensive computer systems.在拥有大量计算机系统的中型到大型企业，the corporate database is usually created by technical information speciallists, such as the database administrator.公司数据库通常是由信息技术专家（如数据库管理人员）所建立，but the database management system is acquired by the information systems department.但数据库管理系统却是由信息系统部门所获得。Users generate and extract data stored by the database management system.数据库管理系统所存储的数据是由使用者产生并提取。As with systems analysis and design.正如系统分析与设计一样。to design a database the organization must describe its informational needs to the designers and specify the type of data needed,为了设计一个数据库，企业组织必须向设计者描述其需要，并规定所需数据的类型。Users participate heavily in this process of defining what information needs to be stored in the database.在规定数据库需要存储哪些信息需要的过程中，使用者要参与大量的工作。Since the early 1980s, tremendous advances have been made in developing database management systems for microcomputers.自从二十世纪八十年代早期以来，在开发微型数据库管理系统方面，已经取得了惊人的进步。They are now easy enough for users to learn to operate without assistance and powerful enough to produce valuable management information.在无人帮助下，这种数据库管理系统极易被使用者学习使用，在产生有价值的管理信息方面，也极为有力。Regardless of whether you're in a large or a small business ,you cannot afford to do without the capabilities that a DBMS can provide.无论你是在一个大企业或小企业里，如果没有DBMS提供的作用，你将无能为力。Notes注意事项Regardless of whether you're in a larger or a small business ,you cannot afford to do without the capabilities that a DBMS can provide.无论你是在一个大企业或小企业里，如果没有DBMS提供的作用，你将无能为力。