For those of you people who use flash intros...

For those of you who use flash intros on your site, check out this workflow to determine if it makes sense to use it on your website:

Add auto_increment and primary key after table is created and already has rows

I needed to do this the other day and couldn't find any good examples on how to do this.

set @counter = 0;

update table
set id = (select @counter := @counter + 1 from dual);

This will allow you to replicate the behavior of auto_increment after the fact.