一、数据库概述随着现代科学技术的发展,信息在人类各种活动中的地位日益重要。信息的具体表现是数据,它不仅包括已经数值化的信息,如水文数据、实验数据、测量数据、统计数据等等,还包括文字、图象乃至声音等形式的信息。现已逐步发展成为一门数据处理的新技术。它包括数据管理技术与数据分析技术,而数据库就是一门现代化的数据管理技术。人们可以利用它迅速地检索查阅所需的资料。众所周知,科技人员研究一个课题,查阅有关文献资料几乎要占去一半的时间,其次是做实验的时间,而真正构思和 I. Overview of the Database With the development of modern science and technology, the status of information in human activities is increasingly important. The concrete manifestation of the information is the data, which not only includes the information that has been digitized, such as hydrological data, experimental data, measurement data, statistics, etc., but also information in the form of words, images and even sounds. Has now evolved into a new data processing technology. It includes data management technology and data analysis technology, and the database is a modern data management technology. People can use it to quickly retrieve information needed for viewing. As we all know, scientific and technical personnel to study a subject, access to the literature and information accounted for almost half of the time, followed by the time to do the experiment, and the real idea and