Re: Composite attributes

In article <3DD9CBDA.4030106_at_earthlink.net>, Jonathan Leffler <jleffler_at_earthlink.net> wrote:
>Juan Pardillos wrote:
>>
>> I've got the same doubt regarding the first normal form. Depending on
>> the text, I get a different opinion about the answer to this question.
>
>This has been discussed recently in Database Debunkings -
>http://www.dbdebunk.com/ - and not in wholly vitriolic terms, either.
> Which books did you read to get different answers?

Codd's original article: no nested relations in 1NF Date in 6'th edition: nested relations but no nest and unnest operators Date in 7'th edition: nested relations with nest and unnest operators

But a much more important question is of course what the arguments are for a certain definition of 1NF.

• Jan Hidders