Chaithanya M,
I see you have a number of basic SSRS questions that can be answered if you look at SQL Server's native help file "Books Online." As I referenced in my last response to your last question, look up these terms there. If you still don't understand what the answer, post a more specific question with the details of what confuses you.
Part of learning SQL Server is learning how to use the tools provided to find your answers first. And then, if you can't find the answers, come back here.
Brandie Tarvin, MCITP Database AdministratorLiveJournal Blog: http://brandietarvin.livejournal.com/[/url]On LinkedIn!, Google+, and Twitter.Freelance Writer: ShadowrunLatchkeys: Nevermore, Latchkeys: The Bootleg War, and Latchkeys: Roscoes in the Night are now available on Nook and Kindle.