Re: Sensible and NonsenSQL Aspects of the NoSQL Hoopla

Am Mittwoch, 28. August 2013 21:53:02 UTC+2 schrieb Eric:
>
> That's because you can't get hold of the idea that physical storage is
>
> irrelevant (as long as it works and is efficient enough).

Physical storage can become irrelevant when the logical model is sufficiently complete. The Relational Model is not, proved by the fact of SQL extensions already starting with DB2. Codd's requirement of row order insignificance excludes grouping and grouped aggregats from his model. Grouping is pretty easy to comprehend, when comparisons between adjacent tuples can be formulated. SQL 1999 with generalized grouping is the next step, but not relational anymore.

To repeat it once more: every theoretical model based on cursors is a valid solution. Cursors are lists of database objects with some sort order and comply with some criteria. Cursors with uniform objects can be viewed as "relations". Directly working with cursors is at least a last resort option when everthing else fail.

m.f.G.
Karl Scheurer Received on Sun Sep 01 2013 - 14:24:00 CEST