Learn how to count the number of unique and distinct values in a column based on data in another column using array in Microsof Excel.

Microsoft Excel is the go-to if you want to calculate a lot of data all at once, but even outside of basic math, you can use the app to find specific info.

We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.