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随着社会的进步和科技的发展,我们已经步入信息时代。在现代企业中,每时每刻都有大量繁复的信息需要分析和处理。为了能迅速、准确地完成信息处理工作,计算机系统已经在企业中得到广泛的应用。 数据库管理系统(Data Base Management System)是计算机信息系统中的一种,它的基本功能是按照用户的要求,从大量数据资源中提取有信息价值的数据,利用查询、汇总、检索等方法获取这些数据。建
With the progress of society and the development of science and technology, we have entered the information age. In modern enterprises, there is a great deal of complicated information that needs to be analyzed and processed at all times. In order to quickly and accurately complete the information processing, computer systems have been widely used in the enterprise. Data Base Management System (DBMS) is a kind of computer information system. Its basic function is to extract information value data from a large amount of data resources according to the requirements of users, and to obtain them by means of inquiry, summarization and retrieval data. build