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

Excel's data validation feature is more versatile than you might think. Learn how to use literal values, input values, list values, and even formulas to restrict input date values using data ...

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.

Microsoft Excel makes it possible for users to easily get around incorrect data entries. In most cases, the user takes advantage of the data validation feature. However, there are times when this ...

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 ...

You can easily create a drop-down list in Excel to limit the values that can be entered in a column. This data validation helps prevent mistakes, such as misspellings. Drop-down lists are also ...