Web select a cell in which you want the dropdown to appear (d3 in our case).
How to create drop down list in excel without duplicates. Excel drop down lists are intuitive. In the data validation dialog. If you don't want users to.
Drop down list without duplicates in #excel: Unique + sort function in excel formula B2=index ($a$2:$a$20, match (0, countif ($b$1:b1, $a$2:$a$20), 0)).
The link is also very helpful. Basically the formula you need is: How to create multiple drop down lists in excel without repetition.
Select the range of cells, click copy to another location,. On the data tab, in the data tools group, click data validation. Web on the data tab, in the sort & filter group, click advanced.