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Hi guys, thanks a lot for the explanations, they are really useful. But I'm still a little bit confused. Could you guys to help me slove the problems about SUMPORDUCT? I am sorry that I cannot type Chinese right now. Thank you very much in advance!
Question1:
As shown in the pic, I have used * in Column D<SUMPRODUCT(($A$2:A2=A2)*($B$2:B2=B2))>, and , in Column E<SUMPRODUCT(($A$2:A2=A2),($B$2:B2=B2))>. The thing I dont undertand is that if "," could treat the nonnumeric as 0 and "*" cannot, why the result in Column D is right but in E is wrong?
Question2:
Compared with Column D, I have made a little modification on Column F<SUMPRODUCT((B2:B2=B2)*(A2:A2=A2))>. The result is wrong again. Could you please explain why do I must use the absolute cell reference? And what does SUMPRODUCT(($A$2:A2=A2)*($B$2:B2=B2)) mean?
Thanks again!!!!
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