Thank you i manged to get it right.

On page 99 (https://drive.google.com/open?id=0ByFnKe4djAO-d29ZTUJrbExhbzQ) they give this expression: YEAR(GETDATE()) - YEAR((DT_DATE)BirthDate

I get an error when trying to do this. I left this out and manage to finish the task, only to have no data loaded in the table or am i wrong?