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 ...

Isolating values in an Excel 2007/2010 worksheet or workbook is common in both error-checking and data analysis tasks. While appropriate even for a small worksheet, the functions that isolate a value ...

Learn how to calculate stock beta in Excel using historical price data and formulas—enhance your investment analysis with ...

How to combine Excel’s VLOOKUP() function with a combo box for enhanced searching Your email has been sent When entering data in Microsoft Excel, an autocomplete feature attempts to help. You probably ...

Sometimes you need to scan some files for a piece of data like a string, phrase or some number, and one of those files just happens to be an Excel spreadsheet. You could open up the file, launch the ...

It's time to dump the pie charts and move to donuts or even waterfalls to show off your data in ways people can better grasp. Have you noticed that people groan when you pop open a spreadsheet to ...

The T-Value is a common statistical calculation with a very wide range of applications. In the business world, it can help in making educated financial predictions and projections. For example, a ...

For decades, Excel worked on a simple principle: you enter a formula into one cell, and it returns a single result into that ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Robert Kelly is managing director of XTS Energy LLC ...

If you see the error “This value doesn’t match the data validation restrictions defined for this cell” when entering a value in an Excel cell, the solutions ...

While opening an Excel spreadsheet, if you get an error message saying External Data Connections have been disabled, here is how to get rid of it. It appears when ...