In this exercise, we clean up a file from duplicates. The easiest way would be to use a GroupBy node, group by contract IDs and take only the first item in the group. A more complex way would be using a group loop. But we choose the most complex way of all, through a TableRow to Variable Loop Start just to show how the TableRow to Variable Loop works.
This is a companion discussion topic for the original entry at https://kni.me/w/9Gyh-VRAw2Yv21d-