Re: a union is always a join!
From: paul c <toledobythesea_at_oohay.ac>
Date: Fri, 27 Mar 2009 15:03:58 GMT
Message-ID: <yV5zl.18811$Db2.2114_at_edtnps83>
Date: Fri, 27 Mar 2009 15:03:58 GMT
Message-ID: <yV5zl.18811$Db2.2114_at_edtnps83>
Brian Selzer wrote:
...
> If a user issues an insert, isn't it reasonable to assume that it concerns
> something that isn't already represented in the database? ...
It's not "reasonable to assume" anything that doesn't obey the Information Principle.
> ... the assumption that an update is essentially the same thing as a delete
> followed by an insert isn't.
>
There is no such assumption, it is a fact - you yourself posted the TD definition that REMOVE's the 'deleted' attribute values.
You are just playing with words. Received on Fri Mar 27 2009 - 16:03:58 CET