Count unique values with criteria
For reasons explained below, we do this with the LEN function and the SUM function. This formula is dynamic and will recalculate immediately if source data is changed. The approach isexplained in more detail here. For more details, see this training video:How to filter with multiple criteria. COUNTA It is possible to write a simpler formula that relies on theCOUNTA function. However, an important caveat is that COUNTA will return 1 when there are no matching values....