Database Management

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What is a database management system? Discuss each of the five important software components of a database management system.

Data Base Managements System (DBMS) is a computer software program installed on a system hard drive that catalog, retrieve, and run queries on data. It provides ways for data to be altered or removed by users or other programs. There are several different types of database management systems that exist that were created for the proper control of databases for specific purposes.

The five software components of a database managements system are DBMS engine, data definition subsystem, data manipulation subsystem, applications generation subsystem, and data administration subsystem (Cummings, 2010).

Database management systems engine is the central component of the DBMS it stores and retrieves data it accepts logical request from multiple other subsystems and transform them into its physical equivalent. The DBMS engine collects logical requests for data users and issues physical input/output requests to the computer operating system. The data requested is gathered from physical storage and while the data remains in memory, it is managed by the DBMS engine.

Data definition subsystems create and maintain data dictionary. Define structure of the files within the Data Base. Its logical structure must be defined prior to entering information and any time information is entered or deleted the data definition subsystem must be used. Field name, type, form, default value, validation rule, is an entry required, and can there be duplicates are examples of logical properties (Cummings, 2010).

Data Manipulation Subsystem is used to add, change and delete information in a database. There is software in the ...

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... performance products.

Some examples is nanotube which is have been added to the frames of tennis racquets and gulf clubs. Nanotubes are some of the toughest materials known to exist to man. Since these tubes are microscopic, millions can be added to the tennis racquet to make it strong in order to give tennis players more control and power. Medicine is another area in which nanotechnology transforming. With the medical field dealing with things on the smallest level, the small nano devices are being developed to enter the body. An example is Nano robot which is a computer-controlled robotic device used to treat and eradicate diseases.

Nanotechnology differ from traditional manufacturing in which traditional manufacture take a large item and break it down to its smallest form, nanotechnology starts at the smallest form and build up (Cummings, 2010).

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