Hello Everyone, I need help for a report I'm doing on SAS 9.4 , I have to sum the number of customer calls depending on a date, let's say 31/01/2018 : I need in seperate columns : The month sum, the last month sum, the last trimester sum and the last 12 months sum . I really dont know how to do it , here a screenshot of the data : Thanks in advance for any tips, I put on attach how this need to look
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