Hardware: hardware consists of the physical devices that make up the system. Examples of hardware include computers, disk drives, and networks 2. Software: software consists of the programs that run on a computer. The software that makes up a database system is the operating system, the DB'S, and application programs and utilities 3. People: the people that use and manage the database system include system administrators, database administrators, database designers, programmers and end users. 4. Procedures: procedures are the rules that govern the use of the database system. 5. Data: data is the raw material stored in the database.
It is used to generate information. The functions of a DB'S are: 1 . Data dictionary management: removes structural and data dependency from the system by storing information about data and relationships in a central location. 2. Data storage management: manages the data that is physically stored on the computer disk. 3. Data transformation and presentation: transforms entered data into structures that are stored. Converts logical commands into ones that physically retrieve data. 4. Security management: provides access control for the data allowing only valid users to access the data. 5.
Multiuse access control: allows multiple users to access the same data at the same time. 6. Backup and recovery management: allows data to be backed up and restored into a database that has been corrupted. 7. Data integrity management: enforces integrity rules to prevent problems caused by redundant and inconsistent data. 8. Database access languages and application programming interfaces: database query languages provide a way to interact with the database in order to create tables, etc. And to manipulate data.