Database

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Recommended: Advantages and disadvantages of database management systems

Database A database is an organised body of related files and or information.

It is simply an automated library system an is maintained as an

integral part of most organisations worldwide. A cite on the World

Wide Web, the Webopedia Computer Dictionary, refers to the database as

a collection of information organized and presented to serve a

specific purpose. (A telephone book is a common database.) A

computerized database is an updated, organized file of machine

readable information that is rapidly searched and retrieved by

computer.

A Data Base Management System is a collection of programs that enables

you to store, modify, and extract information from a database. There

are many different types of DBMSs, ranging from small systems that run

on personal computers to huge systems that run on mainframes. The

following are examples of database applications:

· computerized library systems

· automated teller machines

· flight reservation systems

· computerized parts inventory systems

From a technical standpoint, DBMSs can differ widely. The terms

relational, network, flat, and hierarchical all refer to the way a

DBMS organizes information internally. The internal organization can

affect how quickly and flexibly you can extract information. Requests

for information from a database are made in the form of a query, which

is a stylized question. For example, the query :

SELECT ALL WHERE NAME = "SMITH" AND AGE> 35

requests all records in which the NAME field is SMITH and the AGE

field is greater than 35. The set of r...

... middle of paper ...

...ructions to display, rotate or expand the drawing on

a screen.

To conclude, we sum up by reiterating Masiiwa and Kabanda's definition

that a database is a logically coherent collection of data with some

inherent meaning. By data, they mean the known facts that can be

recorded and have implicit meaning. Organisations need this system or

a DBMS in place because it stores tonnes of information that otherwise

would be cumbersome to retrieve if everything was on lever arch files

and papers and in employees offices.

REFERENCES

1. Kabanda, G. and Masiiwa, C. (2004) Management Information Systems,

Module Comp102. Zimbabwe Open University. Harare

2. Webopedia Computer Dictionary (2004) www.google.com search engines.

3.

4. saafrzw001

5. A:Database merits & Demerits.doc

6. October 5, 2004 12:04 PM

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