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 ...

In this article we will show you how to display multiple columns in a validation list in Excel. We will show you a method that can then be applied to your data.

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 ...

This illustrated walk-through (with a demo worksheet) shows how easy it is to create a multi-column search solution using validation lists and conditional formatting.