From: | <kaiq(at)realtyideas(dot)com> |
---|---|
To: | Stephan Bauer <stephan_bauer(at)gmx(dot)de> |
Cc: | pgsql-sql(at)postgreSQL(dot)org, Dietmar Kling <dietmar(dot)kling(at)sam-net(dot)de> |
Subject: | Re: [SQL] select with group by problem |
Date: | 1999-12-17 15:26:13 |
Message-ID: | Pine.LNX.4.10.9912170919030.26477-100000@picasso.realtyideas.com |
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Thread: | |
Lists: | pgsql-sql |
because there is a sum. sum always results something, even
the something's value is a null ;-)
On Fri, 17 Dec 1999, Stephan Bauer wrote:
> Hello,
>
> could anyone tell me why the second select statement returns one row.
>
> regards
>
> Stephan
>
> xtra=> select * from
> warenkorb;
> cookie|datum|artnr|artnr1|artnr2|artikelname|farbe|groesse|menge|preis
> ------+-----+-----+------+------+-----------+-----+-------+-----+-----
> (0 rows)
>
> xtra=> SELECT artnr, artnr1, artnr2, artikelname, farbe, groesse, SUM(
> menge ),
> preis FROM warenkorb WHERE cookie = 'asdfasdf' GROUP BY artnr, artnr1,
> artnr2,
> artikelname, farbe, groesse, preis;
> artnr|artnr1|artnr2|artikelname|farbe|groesse|sum|preis
> -----+------+------+-----------+-----+-------+---+-----
> | | | | | | |
> (1 row)
>
> ************
>
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