I am so sorry for being such an amateur but I have to ask another question. I know all these "Beginner questions" can be annoying but this would be really helpful for me.
I located the table now and opened it with mysqladmin (because that's the only way I know) and the screen looks like this (please see attachment).
Now I'm quite confused where I need to enter the URL for the picture.
Or do I need to get there in a different mode. I'm really sorry for all these questions but I don't know anything about MySQL.
Thanks for your help. It is very much appreciated.