The syntax for counting the number of unique values from a list of a column using the array formula is as follows: =SUM(IF(COUNTIF(<first cell from which you count the number of unique values>:<last ...

The article, How to highlight unique values in Excel, shows two easy ways to apply conditional formatting to unique values or the row that contains a unique value. In this article, we’ll do the same ...

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 ...