simple database question

I'm using the basic MySQL.exe console and I'm creating a simple database for practice purposes. I've made some errors. Do I have to start all over again? Or, is there a way to back in the code and re-write just the part that I goofed. Thanks- ===== ---------------- "forget your lust for the rich man's gold. All that you need, is in your soul. You can do this if you try. All that I want for you my son, is to be satisfied" ~ Lynard Skynard