Prompt for a Port Number when using sql-mysql

[Cristian]

Hi. I've been using the sql-mysql function for a while to interact
with our
databases and it's worked out well. Recently a coworker set up another
database on a separate port that I need to access, but I don't know
how switch between the ports easily.

Is there a way to have sql-mysql prompt you for a port number (and use
the default if you don't specify one)?