• Can you set up some sample data for folks to code against? Coding up a running totals script is easy. Trying to imagine how your data looks before and after the update is incredibly hard. There's a link in my sig to show you how to do it. Thanks.

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

    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