Hi everyone,
I have this problem: I need to count how many different values are there within a column which meet certain conditions. I have the extra difficulty of refering data from a different workbook while it's closed, so I can't use Countifs nor Sumifs, only the Sumproduct workaround. I can't attach a sample file (I don't know why), but it's something like this. Let´s assume I'm a car dealer and I want to know how many different colors I have for cars from year 2015 :
CAR REF YEAR COLOR
001 2015 Red
002 2016 Blue
003 2014 Green
004 2015 Red
005 2015 Blue
006 2016 Red
007 2014 Green
The answer is obviously 2 in this case, but you get the idea. Any help would be really appreciated.
Regards.
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