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Re: question on UNION

From: Andrew Newman <andrewfnewman@gmail.com>
Date: Tue, 5 Jun 2007 15:55:08 +1000
Message-ID: <2db5a5c40706042255i57f0bf40vb6d6657eefdcea2e@mail.gmail.com>
To: public-sparql-dev@w3.org

On 6/5/07, Steve Harris <swh@ecs.soton.ac.uk> wrote:
> if that works then you have a bug. The behaviour of SPARQLs UNION is not
> very natural from a relation algebra p.o.v., and this may have confused
> developers familiar with that.
>

Isn't it just outer union?  And isn't outer union just part of SQL 92.
 And isn't SQL 92 implemented by most (all?) databases.
Received on Tuesday, 5 June 2007 05:55:12 UTC

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