Re: Object-oriented thinking in SQL context?
From: paul c <toledobythesea_at_oohay.ac>
Date: Wed, 10 Jun 2009 04:00:59 GMT
Message-ID: <%dGXl.31244$PH1.14048_at_edtnps82>
Date: Wed, 10 Jun 2009 04:00:59 GMT
Message-ID: <%dGXl.31244$PH1.14048_at_edtnps82>
David BL wrote:
...
> There is nothing self-contradictory about a relation type that uses a
> database type as the domain type for one of the attributes, meaning
> that values of that domain type are sets of named relation values.
> ...
Sorry, I may have made a mistake by assuming that English is your first language. What you are suggesting only works in conventtional theory if the relation values are values of the same relation type, in which case you tare talking about RVA's, not DVA's. Unless you have a different, unspecified algebra in mind. Suspect the next question will be along the lines of "why?" but I'll try to pre-empt that and ask first, "why not English?". Received on Wed Jun 10 2009 - 06:00:59 CEST