The Design And Fulfillment Of A Certain Information System Based On The Distribution Environment

As our society has stepped into an era of information nowadays, more and more information has been stored in the computers. Therefore, the storage, management, share and extract of the information arouses even greater concerns of people who use them. With the development of the database and network techniques, the distributed database system has not only obtained the relatively mature development in theory , but also acquired the very great progress in application.However, many old information management systems can not meet our needs now mainly in the aspects of the following: the massive quantity of the information; the poor accuracy of the materials; the repetition of the information; the huge datum; weakness in share; the slowness in speed and update; the failure in the statistical datum in the company; the lost of materials caused by the communication between agencies and their headquarters by means of telephone and facsimile and...