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.

When counting unique values in Microsoft Excel, use UNIQUE() as a helper function and avoid more complicated expressions.

If you are unfamiliar with inputting formulas into Microsoft Excel, the much simpler way to get the number of unique values in an Excel column is through a filter.

Combining UNIQUE with COUNTA allows you to count the number of unique entries in a dataset. Dynamic array formulas in Excel 365 enhance the flexibility and efficiency of the UNIQUE function.