Nextcloud SQL Problems

[nospamplease]

I just want to get to the command line for SQL(mariadb). I have nextcloud installed as an application. No SQL commands work in system shell or applications pod shell. Nextcloud has SQL(mariadb) or it work not be working. I did read the Database configuration doc on the nextcloud website and found four different types of database configs. I tested all four commands of system shell or applications pod shell with anything happening. How do I connect to this part of my application?

 

[amlamarra]

I think the TrueCharts version of Nextcloud uses Postgresql. And in a separate container.