Randomly sum rows

Question

I would like to randomly insert in a new temp_table the records from the Initial Table below, grouping them by a new PO number (1234-1, 1234-2,etc..) where each group sum(TK

Answer 1

The logic of the 1234-1, 1234-2, etc is to break the records into groups that represent a carton. If the order has 100 line items, I may need n cartons (n groups) to pack all the items.