Block bad data, duplicates, and incorrect dates with these custom rules.

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 built-in ...

Reversing the order of a column would be easy if the column was already listed alphabetically or sequentially; you would just sort in the other direction. However, data may not be in alphabetical or ...

How to use UNIQUE() to populate a dropdown in Microsoft Excel Your email has been sent Populating a dropdown with a dynamic list is easy thanks to Microsoft Excel’s UNIQUE() dynamic array function.

Please note: This item is from our archives and was published in 2003. It is provided for historical reference. The content may be out of date and links may no longer function. Q. I often recruit ...