title: Specify a Port Number in Emacs sql-mysql
body: <p>I've been using Emacs's sql interactive mode to talk to the MySQL db server and gotten to enjoy it. A developer has set up another db on a new non-default port number but I don't know how to access it using sql-mysql.</p>
  
  <p>How do I specify a port number when I'm trying to connect to a database?</p>
  
  <p>It would be even better if Emacs can prompt me for a port number and just use the default if I don't specify. Any chances of that?</p>