Hi,
there is no official MySQL snap for the ctrlX CORE. But searching through the web I found this experimental MySQL snap. Maybe you could try this one. But be aware, that its considered to not be ready for production.
Find the Experimental MySQL Community snap on snapcraft.io.
Update: I found also this MySQL Server snap. But be aware, that no one has tried out these snaps at ctrlX CORE before.
... View more