Database Management System Components

Database software is certainly a complex program that helps people work more efficiently with large amounts of data. Databases have revolutionized the ways in which companies keep track of their customers and other similar data for different types of enterprises. Here one can read more about the database management system and the ways in which this concept is different from the database architecture described elsewhere on this website. So, read on and find out more about the DBMS components and their role in a DBMS.

A database management system comprises seven major components: its external interfaces, its language engines, query optimizer, database engine, storage engine, transaction engine and security engine. The DBMS external interfaces are the ways in which the end user communicates with the database management system in order to perform the desired operations. This may include anything from defining the data, assigning security levels to querying the data or more. The interfaces can take several forms they may be user interfaces or applications (APIs).

The database language engines are the bits that process the database language expressions. Every operation in a database relies on expressions in a database language which may be words or parameters. The database language engine extracts the needed database operations from a certain expression in a manner that can be successfully interpreted and executed by the DBMS. The query optimizer is responsible for selecting the most efficient query plan while the database engine performs that operations required by the end user on the database objects. The storage engine codes the information into bits and the transaction engine processes the actual operations that the database is requested to perform by the end user and which are aimed to retain the integrity and reliability of the database. Lastly, the security engine manages the database aspects linked to security within a database management system.