Count paired instances where their elements are in different columns

Question

My searches for answers have been limited by my lack of knowledge of the appropriate terminology. My goal is to count the number of times a specific username appears in one column AND the number 1 appears in another column for that user. I attempted to use COUNTIF, but it doesn't seem to format for that purpose.

What I'm needing is to count the number of instances "username" appears in column K when "1" appears in column Q.

Answer 1

If you have =COUNTIFS (you don't mention which version of Excel) please try, in Row1 and copied down to suit:

=COUNTIFS(Q:Q,1,K:K,K1)  

there may be better ways (eg a PivotTable, an array formula or =SUMPRODUCT) but this could be one of the simplest.

Alternatively of course just filter and read the count in the bottom left-hand corner of your screen.

Showing COUNTIFS, SUMPRODUCT, PivotTable and filter options:

In this special case, because one of your criteria is 1, you might also use SUMIFS.

Because the data happens to start with a list of unique Users in order the COUNTIFS version in Row2 (adjusted to K2 from K1) entered with Ctrl+Shift+Enter and copied down to Row 6 will show a result similar to that in the PT.