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.

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

The simple Table object in Figure A duplicates a few names across four columns. Our task is to create a single list of values repeated across any two columns. We’ll start with quarters 1 and 2.

Excel formulas like UNIQUE, COUNTIF, and CONCATENATE offer flexibility for identifying and handling duplicates in complex datasets.