I have a dataset that looks similar to this:
As you can see some ABNs have multiple business names attached while others have just one. I want to create a filter that allows the user to see just those rows where there are multiple names to each ABN. For example, a filer that will filter out ABN 456.
I can imagine how I would write that in SQL, but cannot get my head around how to do it in Tableau. Any help would be appreciated.