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Excel COUNTIF Function - a range as criteria ?
Hello
I just try to analyze how the uniue formula works which I got on an internet page i.e. =SUMPRODUCT((1/COUNTIF(A1:A5;A1:A5&""))) This counts all unique entries in A1:A5. But how deos the COUNTIF(A1:A5;A1:A5&"") work here? Interesting is the criteria part. A range as criteria? I Can anybody tell me what this criteria and especially the '&""' does here? Thanks Mark Egloff |
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