Database Management:
Prior to the advent of the Database Management System (DBMS), organizations stored data in a file-processing system. In a file-processing system, records are stored in various files. In order to extract, add, or delete records in a particular file, various application programs need to be written. The file-processing system has certain disadvantages like difficulty in accessing data, duplication of data, large storage space being required, and other security related problems. These difficulties led to the development of the DBMS.
The DBMS consists of interrelated data and a set of programs to access the data. A database is a collection of related data that is organized to give access easier. The information may be of any sort. The primary part of DBMS is to give a convenient and efficient environment for saving and retrieving information in a database. The management of data has the definition of structures for data storage and the provision for manipulation of data. It also ensures system security, preventing data loss because of system failure, and unauthorized access.
Data that was previously stored in files is now consolidated and stored in databases. A database is a collection of logically related records and files. The data stored in a database is independent of the application programs using it. For example, instead of storing payroll details in separate files, it can be consolidated and stored in a database.
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