Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has ...

A common use of data validation is to create a drop-down list. Use it to restrict the type of data that users enter into an Excel cell.

Learn how to create a drop-down list using Data Validation in Excel. Data Validation limits the type of data that can be entered into a cell.

When you update this spreadsheet with new or different data, you won’t have to re-create the validation rule, but you will need to click Circle Invalid Data again. This tool would be useful to bring ...

How to Make a Drop-Down List to Choose a Date in Excel. Microsoft Excel lets you create simple forms that your users can enter data. To save them time and make sure you get the information you ...

Susan Harkins shows you a quick method for removing validation rules for multiple ranges in Excel, at the same time.