The Bobby Tables guide to SQL injection

This post is just:

A post of the xkcd comic (http://xkcd.com/327/)

A link to the actual meat of this article (http://bobby-tables.com/)

A few URLs (mostly unread by the author) that all show up on the first page of a Google search for "SQL Injection" (http://www.google.com/search?hl=en&q=+SQL+injection&...)

Already discussed to death here:

(And note that there are significant caveats to this "guide".)