@siva5578 wrote:  In the sample table I had provided, I would have to create separate SAS dataset for each customer and use PROC GLM for each of those datasets. No, one data set works fine.   If I am dealing with large volume of accts, this is not an option at all. So, I don't think I can use SAS PROC for this. Please correct me if I misunderstood how Proc GLM would work. Sure it works if you follow these instructions: https://blogs.sas.com/content/iml/2017/02/13/run-1000-regressions.html   ... View more