Why the fuck do I have to follow DB lectures when I fucking know all the stuff already? Fuck you university and your policies about attendance!

@AndSoWeCode Sorry for the late reply. Anyway, we "studied" hierarchical queries last test, but I forgot everything because it's not something I use everyday.

The problem is that we are doing data normalisation for the 3rd time in this course, and they explain only until 3NF. Same thing for the different types of joins. Being it a University course, I'd like to study more complex topics.

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