But if you are alt-tabbing, you no longer have the full suite of Sublime Text tools to work with. You don't have multiple cursors, and you can't use goto file, you don't get nice syntax highlighting, you can't select and execute SQL embedded in other source code files.

In the grand scheme of things, I think it all depends on how much you interact with a db. If you just run an odd command here and there, $30 may seem like a lot. If you work with databases for an hour or more a day, this could be a huge time-saver.