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

To apply data validation rules to a selected cell or range, head to the "Data" tab on the ribbon, and click the top half of ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. David Kindness is a Certified Public Accountant ...