So... the major problem with your article is that it posts no solutions for the problem at hand, or no pointers to where to look further to increase one's kungfu skills in this area.

I can't find one of my JCelko books that talks about calc'ing running sums in SQL and how he or some of his readers do it, but that would be one good* place to look ("SQL for Smarties" etc).

(* I realize that some people out there have a definite love-hate..no, hate relationship with JCelko's scribblings...but I don't, so feh. But if you have other resources, do add them to the thread).