Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> comp.databases.theory -> Re: In an RDBMS, what does "Data" mean?

Re: In an RDBMS, what does "Data" mean?

From: Tony <andrewst_at_onetel.net.uk>
Date: 14 Jun 2004 02:40:31 -0700
Message-ID: <c0e3f26e.0406140140.4566cac1@posting.google.com>


"Dawn M. Wolthuis" <dwolt_at_tincat-group.com> wrote in message news:<caimee$rnh$1_at_news.netins.net>...
> Combination of metadata and data that is designed out of the relational
> model, such as orderings, and attributes with cardinality > 1 that are
> trimmed back to 1 for the relational model.
>
> Did that help or am I digging a deeper hole? --dawn

Yes, you are. Well, at least you are wrong. The relational model doesn't force you to "design out" anything. If an ordering is required, then the relational model requires that you state it explicitly via an additional attribute, that is all. Attributes with cardinality > 1 are moved to a separate table by the normalisation process - again without loss of any information (not even "meta-information"). Received on Mon Jun 14 2004 - 04:40:31 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US