If you wish to count the same or duplicate values in a column only once in Excel or the count of occurances of duplicate values, read this article.

How to remove duplicates in Excel for a single column When you have duplicate data that you want to remove from a single column in your dataset, start by clicking into the column you want to dedupe.

How to remove duplicates in Excel Now that you know which values in your spreadsheets are duplicates, you can remove them. You could simply hide the columns, but permanent deletion may be preferable.