How to delete mysql databases?

[Skywatch]

Indeed I found some logs today and they were not pretty reading either. Lots of connections to mysql server 'refused' ??? All pretty academic now as I won't spend more time except to re-install it all. Even all the backups were 'corrupted' the same way - tried a few of them and all the same.

So I am now compiling a list of things to install, configure, set up, modify etc in order to rebuild this one.

The USB/SD were new about a year ago. Both either sandisk or samsung, so shouldn't really be the problem. I will test both before deciding to reuse or replace them (note to self to check if pi drive has become available yet).