I have a dropdown (#selectCountry) which if I connect to a dataset (#expDataset) and filtered to the column names "country" it correctly displays all "countries" in the datase. I need to populate the dropdown but only with the unique names in that dataset. Currently I have 5 rows: Argentina, Argentina, Zambia, Cambodia, Brazil. In the dropdown, I only want it to populate as: Argentina, Zambia, Cambodia, Brazil.
How do I filter out the repeated values?