Custom SQL Reports have been introduced in the development version of MMEX with improved functionality.
Only problem is that in order to create new scripts, one needs to understand the syntax for SQL.
In researching the syntax to SQL as a refresher to creating scripts, I found this SQL tutorial site which I found useful:
http://www.1keydata.com/sql/sql.html
If you read around the advertising, it explains the syntax used for creating and understanding SQL scripts.
I hope this may be useful to others.
