For each month I need to know how many customers who have positiv sale at least one of the last three month.
For each month 3 months rolling back.
The attached worksheet shows my question.
For each month I need to know how many customers who have positiv sale at least one of the last three month.
For each month 3 months rolling back.
The attached worksheet shows my question.
Last edited by Saturn; 10-05-2011 at 06:16 AM.
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