can anyone help me about database in linux such that in which purpose database needs in linux. Why do we use database in linux??

Hello,

Why do you use a database 'at all', undependent of what OS you're running?

You can use databases in Linux the same way as databases are used in any other OS. It all depends on the application. Database systems are not OS dependent or typical. You have for example MySQL, PostgreSQL, Informix, Oracle, ... All those mentioned run on Linux (and other OS).

If you ask a more detailed specific question then we'll be able to provide a more detailed answer.

Kind regards,

Eric

How to answer this, I think you need work on it
What is operating system?
What is Database?
Why need Database?
etc......

take a look at
http://www.helpwithpcs.com/jargon/database.htm
http://www.thesitewizard.com/faqs/wh...database.shtml

Databases are often used in web servers. Since most web servers are running GNU/Linux, it obviously needs them too.
Databases are used for storing/handling records of anything. The easiest example, would be that of a web shop, you "search" through a web site using a database, which searches through the article's name, description, and etc tables. To "buy" something you need to know the price of the product (which is in the database, and makes it easier to change anytime you want), and when actually bought databases may check for quantity left, etc, all inside the database. Also to "log in" in a site, your information (id and password) is searched in a database too.