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Folk generally don't study relational algebra, on its own, for fun.


SQL is one of those technologies that caps how much enjoyment you can derive from understanding the related theory. Scheme, for instance, never stops giving, but you can hit a point with SQL where you start to wonder: where's my Tutorial D?


And where are my proper temporal primitives?

It sucks, but it's what we have for now.


They really should.




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