Re: Relational Databases Lack Relationships

On 2015-10-29 15:35:19 +0000, Eric said:

> On 2015-10-28, Nicola <nvitacolonna_at_gmail.com> wrote:
> 8>< --------

>> Currently, the most common
>> implementation of a relation in a DBMS is a row-ordered record-based file
>> (with a one-one mapping between a table definition and a file).

I don't have numbers, and I'd like to be proved wrong. As far as I know, that is the layout (or among the layouts) used by the most popular DBMSs.

But even if the all the DBMSs in the world used a different storage model, my point stands still, that is, there is a widespread misconception by which the notion of a "relation" is inevitably associated to a specific kind of physical representation or, even worse, to the implementation used by a specific product - the book you've cited being an example.

Nicola

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