Microsoft Excel is perhaps the most powerful spreadsheet application you can buy. But it also has some simple functions, like finding duplicates in data.

How can we find duplicate values across multiple columns? For this task, we’ll use two Excel helper formulas: One to concatenate the columns you’re comparing; a second to count the duplicates.

Filters are great tools, but you can't remove specific items from the results. When you need to do this, try Find All in Excel instead.