Re: WWW/Internet 2009: 2nd CFP until 21 September x
From: paul c <toledobythesea_at_oohay.ac>
Date: Mon, 17 Aug 2009 13:18:10 GMT
Message-ID: <mMcim.41656$PH1.4336_at_edtnps82>
> You got what I was trying to express. Exactly. Thanks.
>
>
Date: Mon, 17 Aug 2009 13:18:10 GMT
Message-ID: <mMcim.41656$PH1.4336_at_edtnps82>
Walter Mitty wrote:
> "rpost" <rpost_at_pcwin518.campus.tue.nl> wrote in message
> news:h69p4s$2no2$1_at_mud.stack.nl...
>
>> This describes tables with NULLs as shorthands >> for sets of tables without any NULLs at all, >> so it introduces in way that fits perfectly >> into the relational model. >>
> You got what I was trying to express. Exactly. Thanks.
>
>
Are you saying that the table
T1:
K C
1 null
2 3
is shorthand for the two tables
T2:
K C
(empty)
and
T3:
K C
2 3
?
If so, how does T1 = T2 JOIN T3? Received on Mon Aug 17 2009 - 15:18:10 CEST