There are some IFCode tags available to the left of your screen when you're replying. For SQL you need to use [ code="sql"][ /code] (without space).
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2