Adding Query That Requires Info From Multiple Files

Last evening I finished adding information to my first Brilliant Database thanks to some great help from MacHeuS. The database contains four files (three single sheet/tab files and one file that has three sheets/tabs). I am now ready to start adding queries but have already reached a stopping point at my first step. I researched the User Guide and watched the video tutorials but none addressed my issue.

My problem is as follows: is it possible to add a single query that, for example, has to go to another file to extract information. More specifically, I am attempting to recreate a database that I did in EXCEL for managing my organization's employee training. In BD, I have a file listing all 'Employee Names' which contains their 'Job Title'. There is another sheet/tab on the 'Employee Names' file which lists the training 'Courses' that the employee has completed. A separate file lists all 'Job Titles' and contains all training 'Courses' required for that position. I want to be able to see what 'Courses' an 'Employee Name' is missing based on their assigned 'Job Title'.

I had to recursive code in Visual Basic for Applications in the background of EXCEL to make this work in my earlier program. Is this possible to do this in Brilliant Database without having to write code?
Thanks,
Daryl G