Hello there,   this may be a dumb question but I am new to SAS and trying to find out how to solve one problem which in another language like Python I would know (roughtly 🙂 ) how to do.   So my dataset is as follows   ID        product 1         A 1         B 1         C 2         A 2         B     and I want output as follows   ID        product 1         A, B, C   2         A, B     I would like to create an array and iterate tought this dataset and append a product into array every time there is the same ID for customer and when it changes I would like to output that and empty array. But not sure how to append and did not find it 😕   Thank you for any suggestion     ... View more