Yeah, I didn't mean to sound so derogatory, but out of non-formally-trained developer co-workers I've ever had only a handful didn't create work for everyone.

Yeah, I didn't mean to sound so derogatory, but out of non-formally-trained developer co-workers I've ever had only a handful didn't create work for everyone. The two most common issues are inability to create sanely defined and decomposed schemas and clearly written queries, and poor ability to structure code in an organized way. That said, I have known a couple very good coders without any kind of formal education. They just seem to be outliers. When dealing with formally trained developers I've certainly encountered the incompetent also, but I'd say at an easy majority of trained coders I've worked with are competent enough to not be hard to work with. Mind I you I do not claim to be a "superstar developer" or anything. The state of the art tends to change just a bit faster than I can keep up with these days.