Microsoft Forum
Sunday, August 3, 2014
Use of SUM and COUNT with GROUP BY
2014-02-01 to 2014-02-28 for one code and 2014-02-25 to 2014-03-04 for the other code? That should count as two months (and not three) if I understand you correctly? That is we should count the unique months for a customer? Erland, yes, that's true!
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