Prevent duplicates before they happen by combining a simple function with data validation.

A dynamic data validation list, built using functions like `UNIQUE`, `SORT`, and `VSTACK`, allows users to filter and group data efficiently.

How to base a data validation dropdown on an array in Excel Now we’re ready to create the data validation dropdown that will display the unique list in column H.

In most cases, the user takes advantage of the data validation feature. However, there are times when this function is not good enough, and as such, it is best to make use of the Circle Invalid ...

If you see the "This value doesn't match the data validation restrictions defined for this cell" error in Excel, this article will help you.