When you consider how easily most common reporting tasks are accomplished in FileMaker Pro, the lack of a built in, clear cut method to count unique values within a given found set seems a bit surprising. But where there’s a will, there’s a way, and in part 1 we looked at a method that required the found set be sorted. Well I have some good news: today’s demo (Count Unique – Three Variations, 6.4 Mb) has no sorting requirement.
Here we have a flat file (single table) of contact information. For any given found set, the primary key (ID) will of course be unique, but each of the other fields will potentially contain duplicates, and we want to be able to quickly count the unique values without having to first sort the found set.
The basic approach can be summarized in a few words: Continue reading