I would recommend adding a deliberate…
I would recommend adding a deliberate failure in some of the courses elements, so once the problem get's resolved after wrestling to some extent with it, then a better and more persistent knowledge remains. For the PK and FK definition there is one more verbose way of declaration which was skipped like - KEY `FK_key_name` (`col_name`), CONSTRAINT ......, but is available in the create-dbs files. Deeper delving within different relations would be welcome as those are really essential and often bring confusion in the trainees, especially during modelling when need to be decided if it would be optional one, or mandatory one, or optional/mandatory many. The transactions part of the course was really complex and I put higher efforts for getting to the bottom of the matter with the insulation levels. Anyway, the course is really nice and helpful, just need to be further improved for easier understanding.