> PS. Apparently "I see plenty of people who claim to know SQL who do 
> worse than you did. You're really underselling yourself, Andrew. I 
> wasn't even expecting you to ATTEMPT those last few..."

Remember that "unskilled and unaware of it" paper? The more you know, 
the more you know you don't know too (does that make any sense?). People 
may call themselves experts and not know what a JOIN is, and you say 
you're somewhat rusty because you know about lots of features that exist 
but you don't know very well, when you're actually much better than the 
idiot calling himself an expert.

Does that make any sense either? Seems it's impossible to explain this 
without long tricky sentences :)

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