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 ...

Q: I have an Excel spreadsheet that I update weekly with our employees’ Actual Sales and Sales Goals. I manually insert a red circle to indicate those who did not reach their sales goal by more than a ...

Array formulas let you perform calculations across entire ranges of data in a single formula. Hence, you can handle lightning-fast lookups, filtering, and sorting with just one po ...

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 ...

When multiple data variables are accommodated in a project, the time and spatial grids of those variables must be identical. As such, you must control the data other people enter. That’s when you need ...

Follow the steps below to create a drop-down list using data validation in Excel. If you want to add a message pop up, you can click the Input Message tab and check the checkbox for “Show input ...

I've got an Excel 97 worksheet in which I need to validate some cells. No problem, I'll just use Data->Validate, right? Wrong. The built in validation works well enough as long as the user doesn't ...