Re: Pizza Example
Date: Fri, 09 Apr 2004 11:59:10 +0200
Jan Hidders wrote:
> Dawn M. Wolthuis wrote:
>> Jan Hidders wrote: >> >>> Dawn M. Wolthuis wrote: >>> >>>> So, if "the Pizza has Mozzarella and Parmesan cheese" is stored as: >>>> >>>> Pizza Mozzarella >>>> Parmesan >>>> >>>> in a single, uh, record, then if the ordering is unwittingly useful, we >>>> didn't harm that ordering. >>> >>> Indeed, but you did make certain query-optimizations impossible. >> >> If there were emperical data suggesting that queries on this model in >> PICK were faster than those on a 1NF model in any DBMS >> purporting to be relational, then I would not be concerned.
> My goodness. Do I really have to explain to you what the trade-offs are
> between a DBMS with a declarative query language and a good query
> optimizer vs. a system with an imperative query language and no query
Before answering I ignored "My goodness", explained "to you" as "to the valued readers of this newsgroup", and substituted "Do I really have to" by "Is it ok if I".
An explanation of these trade-offs in general may be interesting in another thread. In this one, they are only on topic if they are stated such that they somehow help shaping (that part of) a database which supports the taking of pizza orders. Take your pick (pun unintented). Received on Fri Apr 09 2004 - 11:59:10 CEST