Creating a list of duplicate values that’s separate from the data source is easier than ever thanks to Microsoft Excel's FILTER() function.

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

You can remove duplicates in Excel in a few steps. Duplicates can create problems when you're dealing with data.

How to Remove Duplicates That Are Case Sensitive in Excel 2007. By definition, Microsoft Excel 2007 considers a duplicate to be a row of data that matches another row in your worksheet exactly.

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.