Comment by pearjuice

Doing it in pure SQL is really impressive but I think the real tell-tale sign of peak "cracked engineer energy" is the maintained, decade-old blogspot site. Can't exactly put my finger on it, but really gives off "niche mastery". I don't even know the authors but I'm sure in the right circles a few dudes maintaining a blogspot site called "database architects" for a decade probably don't need an introduction.