Hi So i have data for sales for two years for different companies: Company_code Sales Year 1 5 01 1 25 05 2 150 01 2 75 05 4 1 01 4 9 05 etc. I now would like to create a dataset with the change in sales from year, such as: Company_code DiffSales 1 20 2 -75 4 8 Is it possible to do this with proc sql? I am new to SAS, so help is much appreciated. Thanks
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