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 ...

In the duplicate world, definition means everything. That’s because a duplicate is subjective to the context of its related data. Duplicates can occur within a single column, across multiple columns ...

Whether you want to restrict data inputs, ensure consistency, or avoid errors, data validation in Microsoft Excel is the tool for you. It can also serve as a vital safety net if you plan to share your ...