Assuming that you don't have nulls in prodlang.prodlsku,
this should probably work, although I haven't tried it
for real.
SELECT prodlang.prodlsku FROM prodlang
WHERE NOT EXISTS
(SELECT * FROM prodlang2WHERE prodlang2.prodlsku=prodlang.prodlsku);
If you do have nulls, the inner select probably needs
to be something like:
(SELECT * FROM prodlang2WHERE prodlang2.prodlsku=prodlang.prodlskuor (prodlang2.prodlsku is null and prodlang.prodlsku
isnull))
----- Original Message -----
From: "Zot O'Connor" <zot@zotconsulting.com>
To: "postgres sql" <pgsql-sql@hub.org>
Sent: Monday, July 10, 2000 5:29 PM
Subject: [SQL] Finding entries not in table..differnce?
> I need to write a quick function that tells me all of the entriles in
> table that are not in table2.
>
> The tables are copies of each other, but 1 has been updated. I know
> this is easy, but I am running on little sleep :)
>
> I want to due something like
>
> select prodlang.prodlsku from prodland,prodlang2 WHERE prodlang.prodlsku
> != prodlang2.prodlsku
>
> But of course I would get every record, several times since at some
> point the sku does not equal another sku.
>
> I tried !!= (NOT IN) but it did not like that at all, since sku is a
> char field.
>
> I am running an older version of postgress on this server, I do not know
> if that is important.
