Highlight the entire row if duplicates are in one Google Sheets column. Highlight duplicate cells in multiple Google Sheets columns. Highlight actual duplicates, leaving the 1st instance.

In your sheet, click Extensions, then Remove Duplicates, and choose: Find Duplicates or Uniques. Follow the steps in the add-on wizard to choose the range and columns you'd like to check for ...

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 resulting window shows the data in Power Query (Figure B). Select the column that you want to check for duplicates. In this case, the date column is already selected, so let’s use it.

Excel Online supports sorting by multiple columns. How to sort by two columns Grouping is a common database task, and sorting by multiple columns is essentially the same thing.