Re: Relation Definition
From: Jan Hidders <jan.hidders_at_REMOVETHIS.pandora.be>
Date: Fri, 18 Feb 2005 21:33:50 GMT
Message-ID: <2btRd.14923$9r1.1224870_at_phobos.telenet-ops.be>
>
> In which way is "columnar" a tuple "column"?
Date: Fri, 18 Feb 2005 21:33:50 GMT
Message-ID: <2btRd.14923$9r1.1224870_at_phobos.telenet-ops.be>
Alfredo Novoa wrote:
> On Thu, 17 Feb 2005 22:02:43 GMT, Jan Hidders
> <jan.hidders_at_REMOVETHIS.pandora.be> wrote:
>
>
>>Def. [Tuple] A *tuple* is a partial function that maps column names to >>domain values and is defined for a finite set of column names which is >>called its *header*.
>
> In which way is "columnar" a tuple "column"?
You mean, why did I say "column name" and not just "field name"? Because the field names in these tuples must be valid column names.
- Jan Hidders