There are two situations in which you might need to merge two columns of data in Excel 2013. If you've imported two columns of data from separate sources, you might want to combine them into a single ...

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 ...

How to extract a list of duplicate values across two columns in Excel Your email has been sent There are a number of ways to highlight duplicate values. Conditional formatting might be the most common ...