问题
I've got a membership database and am trying to figure out what the dropoff is for a rolling 3 month period. My current thought is that I need to count if the first cell is not blank (meaning the person wasn't yet a member) and if either of the other two cells is blank (meaning that they dropped off). In the sample data below I'm just using a 1 if the person is a member in the month
My latest attempt is:
=COUNTIF(B2:B5,"<>"&"*",[C2:C5,"<>"&"*",D2:D5,"<>"&"*"])
Toy data:
A B C D
1 Mem# May-16 June-16 July-16
2 001 1 1 1
3 002 1 1
4 003 1 1
5 004 1 1
Desired output would be "2", the number of members that had membership at the start of the period but not at the end of it.
回答1:
Use COUNTIFS():
=COUNTIFS(B:B,"<>",D:D,"=")
来源：https://stackoverflow.com/questions/45553584/excel-countif-multiple-criteria-overlapping-ranges-and-multiple-lines