You might want to take a look at these articles:
http://www.sqlservercentral.com/articles/T-SQL/63681/
http://www.sqlservercentral.com/articles/Crosstab/65048/
The first one covers the basics and the second one covers a dynamic approach that you might need.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2