Introduction to database information management systemThe database is stored together a collection of the relevant data， the data is structured, non-harmful or unnecessary redundancy， and for a variety of application services, data storage independent of the use of its procedures； insert new data on the database , revised, and the original data can be retrieved by a common and can be controlled manner. When a system in the structure of a number of entirely separate from the database， the system includes a ”database collection。" Database management system (database management system） is a manipulation and large—scale database management software is being used to set up, use and maintenance of the database， or dbms。 Its unified database management and control so as to ensure database security and integrity。 Dbms users access data in the database， the database administrator through dbms database maintenance work. It provides a variety of functions， allows multiple applications and users use different methods at the same time or different time to build， modify, and asked whether the database. It allows users to easily manipulate data definition and maintenance of data security and integrity, as well as the multi-user concurrency control and the restoration of the database. Using the database can bring many benefits: such as reducing data redundancy, thus saving the data storage space; to achieve full sharing of data resources， and so on。 In addition， the database technology also provides users with a very simple means to enable users to easily use the preparation of the database applications。 Especially in recent years introduced micro—computer relational database management system dBASELL, ...
