A few years ago the company I was working for ran an advanced SQL course for a few people who were interested. I was skeptical going in, but the chap who ran th

A few years ago the company I was working for ran an advanced SQL course for a few people who were interested. I was skeptical going in, but the chap who ran the course was the real deal. One particularly memorable example he showed was a real world implementation of Dijkstra's shortest path algorithm using recursive CTEs. While it was very impressive I did spend most of the demo thinking "I'm so glad I don't have to maintain that"!