The objectives and requirements of the Database

DATABASE CONCEPT
A database is an organized collection of data. The term originated within the computer industry. In other words, a database is a collection of records stored on a computer in a systematic way. The computer program used to manage and query a database is known as a Database Management System (DBMS). The central concept of a database is that of a collection of records or pieces of knowledge. A great deal of the internal engineering of a DBMS, however, is independent of the data model and is concerned with managing factors such as performance, concurrency, integrity and recovery from hardware failures.

OBJECTIVES OF DATABASE

Below mentioned are some objectives of Database.

1) Database should permit the establishment of a single area for common information that is used by all authorized users.

2) It should allow important information to be recorded on floppy disk, magnetic disk, or mass storage, while secondary records are maintained on magnetic tape or other low-cost storage medium.

3) It should guarantee accuracy of updating by an automatic maintenance feature for all segments of the data file.

4) It should allow variable-length records in order to conserve space.

5) It should have provision for expanding or reducing files, both the number of records in the file and the data elements in each record.

6) It should allow security of files or segments of files.

7) There must be a provision for some types of lockout feature so that certain files or areas of files or even individual records cannot be accessed during updating.