Are there some mathematical theories/theorems/... behind modern development of database management systems and in particular of SQL ? I am refreshing my knowledge of these things which are quite down-...
Still wading through higher category theory. I find the subject a bit intimidating, not so much for technical reasons, but because I lack sufficient intuition as to the motivation(s)/heuristics one ...
Can anyone point me to short survey articles of mathmatical expositions of Codd's relational algebra and calculus (from database theory)? I suspect there's some straightforward categorical ...