Hi all! First time poster, hoping someone can explain to me why I cannot figure this out based on my lurking on other threads.
I have a table (below) tracking information about tours we coordinate. We track the Presenters on each tour and a count field, so I can sum the total number of presenters across all our tours. However, I want to get the number of UNIQUE presenters across all the tours. e.g. if Vivaldi's Four Seasons and Romeo & Juliet both have "Shire of Cue" as a Presenter, how can I make sure it only gets counted once?
To make matter more complicated, I'm hoping to have this unique count number be on the same table as the rest of the information, because otherwise I can't access it easily when building a dashboard interface.
Appreciate any and all suggestions!