If I edit my table, the COUNTIF cell will update with the new count. While my example is a relatively simple use of COUNTIF, you can use the function to check entire worksheets or workbooks.

To extract and sort non-adjacent arrays in your data, nest the CHOOSECOLS or CHOOSEROWS functions inside your SORT or SORTBY formula. Alternatively, to extract, filter, and sort columns from a dataset ...

Vladimir M. Shkolnikov ¹, Evgueni E. Andreev ², Alexander Z. Begun ³, Gini coefficient as a life table function, Demographic Research, Vol. 8 (JANUARY - JUNE 2003), pp. 305-358 ...