Do you want to work ONLY with that column, or do you want to keep the other columns also?
If you wanted to work with only that one column, then you can input all 5 sources into a CAT node, and select "Intersection" for the concatenation type. The CAT node in that case would output only the common columns.
Another (less appealing) choice is to use the "Union" concatenation option.. this would create a lot of empty cells, but the columns from each row would be intact.
Otherwise, your only choice is to go with 5 of the Transform nodes.