Re: Why is "group by" obligatory in SQL?
Date: Fri, 24 Jul 2009 16:14:20 GMT
> The lower level of abstraction of a computing model is the only way a
> programmer, no matter how capable, could make something out of
> relational model. But if much effort was spent on higher abstraction,
> relatively very little was spent defining a relational framework for
> implementation and I am not simply talking about what logical
> operators are to be implemented to build a complete Turing machine,
> but also about the fundamental limitations of a binary system to
> represent a relation. Until this work is done and complete, I am
> afraid a TRDBMS will remain the Holy Graal of computing science.
I suspect that what a 'TRDBMS' is, isn't yet fully known. Lots of open
questions, here're just a few: