In this case, it's motivation for me to stop being lazy and code my own SQL joins. Which has other advantages, since a project with multiple Query Tool steps violates the principle of DRY in a bad way - if you add a new variable to your dataset at the start, you have to manually push that variable through every following step in the program :-/

Basically, EG is designed as a simple and user-friendly SAS interface for people who don't want to have to write their own SAS code - but the point-and-click functionality isn't really suited for complex projects of the sort that a lot of us work on. It does have some good points but it took me a while to realise that some of the "time-saving" features are more trouble than they're worth.