yingchai (6/15/2012)
Thanks to all the feedback. It is actually a work problem, not a homework problem π
It has few of the characteristics of a homework problem. Folks who are too idle to do their homework and post here hoping for a free ride are also, usually, too idle to give a full description of the problem or provide DDL and DML.
You did both π
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden