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 ...
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How to Use the UNIQUE Function in Microsoft Excel
Microsoft Excel's UNIQUE function does exactly as its name suggests—it extracts unique values from an array. In other words, you'll only see each value once in the result, even if it appears multiple ...
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