If you have a large spreadsheet that contains duplicate entries (customer names, class subjects, etc.) and you want to view only the unique records in the list, you can filter out the duplicates.
1. Click in a cell in the desired spreadsheet.
2. Go to the Ribbon and select the Data tab.
3. Go to the Sort & Filter section and click Advanced.
4. Click and drag to select the desired cell range. Check the Unique Records Only checkbox.
5. Click OK.
To return the data view back to its original state with the duplicate records intact, go to the Ribbon, select the Data tab and click Clear.