I have a column (within a database) containing hundreds of Project Numbers
(e.g., P8763, PA3229, P1090.1, etc.), and the same Project Number can appear
more than once in the column. I need to count the number of unique Project
Numbers within that column, based on the criteria of another column. Is
there a way to do that using a combination of the DCOUNTA function and a
formula? Any help would be greatly appreciated.
Thanks.