Hi, I hope someone cam answer the follwoing for me:- I have twenty years experience using I.B.M. AS400 (RPG) but i wish to re-train into Microsoft technology and I am looking to gain SQL server expertise I am unsure if I should concentrate on 2005 or 2008 and which exam I would be suitable for bearing in mind that I have no previous experience of SQL server. I was looking at exam 70-431 or 70-445.