Help with MySQL

Hey everyone. I've been reading the list for a long time, but have only really posted to the mailing list a few times. I just had a quick question about MySQL. I'm not sure if this is exactly relevant to PHP, but it is for a PHP application I'm writing, so hopefully that makes this question ok :) Basically, I was wondering if there are any queries in MySQL that I can use to determine the data types used to construct a pre-existing table. The reason I ask is that I went back to look at the data in a table I've been using for a while and realized that I forgot to document what the data types were (DOH!) I'm sure there's something, but I wasn't quite sure what to google for, so I wasn't really able to turn up anything. Thanks! James