Raj, this is solid advice. When I was in your shoes sixteen years ago, this book helped me to understand what I needed to know. It sounds like you don't know anything, and there is no way in this forum that we can do more than point you. There wasn't a Tabular model then. So that does complicate things a bit for you. You should do some reading on that. Tabular is considered easier, but it won't go as high or handle some complex modelling as well as the Multi-dimensional model can. But if you don't know MDX or DAX, DAX is considered easier. Can't speak to that personally as I only know MDX, but I can attest that was not the easiest thing to learn. Kimball does have a third edition of the book. Try to get that if you can.