To do this in Easy Data Transform: -drag 2 CSV files on the Center pane -click 'join' -select the column in each CSV to join in the right pane -done Depend

To do this in Easy Data Transform: -drag 2 CSV files on the Center pane -click 'join' -select the column in each CSV to join in the right pane -done Depending on the size of the CSV files you can do this in a few seconds (plus ~1 minute to install).