The best place to start will probably depend on your technical and industry experience level. SAS provides a variety of training courses that focus on general SAS programming concepts, but don't really focus on clinical research industry.
There are some excellent books available as well. The Little SAS Book is a great introduction to the world of SAS. The book "SAS programming in the pharmaceutical industry" is clearly more industry-specific, and assumes some basic SAS programming skills.
You should be able to find the books here
http://support.sas.com/publishing/index.html
Good luck in your new position.
Dave