[bayindirh]

Excel has native DB connectivity for quite some time. Maybe they were using that, actually?

Libreoffice Calc also supports the same thing over ODBC AFAIK.

[Lanolderen]

Damn, you might be right. I even made a tutorial on Excel ODBC for our sales department recently and completely forgot it's ancient tech. But even then, why in the hell would you query that much shit outside of management diagrams...