Hi Sreenivasa,
First I will comment and say that both of the previous solutions might work for you, but that depends on how your file looks.
My question to you is therefore, what does your file look like?
Is it build up as a csv-file, with columns separated with a delimiter? What is the delimiter?
How was your file created? Was it exported from a database or maybe som other software?
Are you able to post a part of the file, so we can see how it looks? That would be the best way for us to help you.
You might want to download notepad++ and open your file there.