| From: | "Mike Mascari" <mascarm(at)mascari(dot)com> |
|---|---|
| To: | <dev(at)archonet(dot)com>, "pginfo" <pginfo(at)t1(dot)unisoftbg(dot)com> |
| Cc: | <dev(at)archonet(dot)com>, "pgsql-general" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Wrong query execution. |
| Date: | 2003-01-15 17:47:20 |
| Message-ID: | 01ab01c2bcbe$271cc440$0102a8c0@mascari.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
----- Original Message -----
> > Hi Richard,
> > It is the case.
> > I have found records with NULL's !
> > Exist any docs where I can read more about interpreting of NOT IN ?
>
> There's an item on it in my Postgresql Notes (subqueries and NULLs),
> linked to from
>
> http://techdocs.postgresql.org
>
> You can also read more about it in Bruce's book (also available online
> from the above URL).
>
> Basically, any good relational database book should have a section of the
> meaning of nulls.
And why they shouldn't be allowed in a database. ;-)
Mike Mascari
mascarm(at)mascari(dot)com
>
> - Richard Huxton
>
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