Hi, I need to reverse a table in SAS. For example I have a list of stores (1, ,2, 3, ..., 2000) on the first column and for each store I have a list of customers (1, ,2, 3, ..., 2000) in the following columns, but this list is limited to up to 12 customers (random number of customers per store). Now I need to reverse the story, i.e. to build a list of costumers sorted from 1 to 2000 on the first column, and for each customer to find from the original table a list of corresponding stores. How can I do that in SAS? Thank you! ... View more