From: | "Horaci Cuevas" <hcuevas(at)perti(dot)com> |
---|---|
To: | <pgman(at)candle(dot)pha(dot)pa(dot)us> |
Subject: | PostgreSQL |
Date: | 1999-11-26 15:49:55 |
Message-ID: | NABBJFCKFCOHFBNGLGHOAEGDCDAA.hcuevas@perti.com |
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Thread: | |
Lists: | pgsql-general |
Hi!
I'm using PostgreSQL for a search-web based database, and i saw a missing
function mostly found in DB2 and others, where, you can get results from
a query having a WHERE condition to exist or not in another SQL sentence .
In DB2 is:
SELECT field1, field2 FROM tab1 WHERE field1 IN ( select field3 from tab2 )
or
SELECT field1, field2 FROM tab1 where field1 NOT IN ( select field3 from tab2 )
PostgreSQL already has that, but only allows to return 1 result, ex:
SELECT field1, field2 FROM tab1 where field1 =
( select field 3 from tab2 where id=1 )
Would be great if that where added to the TODO as a future Feature.
Thanks in Advance.
Horaci Cuevas.
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