From: | "Tena Sakai" <tsakai(at)gallo(dot)ucsf(dot)edu> |
---|---|
To: | "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com> |
Cc: | <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: compare 2 tables in sql |
Date: | 2008-03-20 17:44:50 |
Message-ID: | FE44E0D7EAD2ED4BB2165071DB8E328C0378F13E@egcrc-ex01.egcrc.org |
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Thread: | |
Lists: | pgsql-sql |
Hi Jonah,
Just a postscript. It is important to check
both ways. Because (sometimes) vice versa is
not necessarily true. Case in point below:
blitzen=> select * from foo
blitzen-> except
blitzen-> select * from moo;
alleleid | markerid | value | datecreated | datereplaced
----------+----------+-------+-------------+--------------
(0 rows)
blitzen=>
blitzen=> select * from moo
blitzen-> except
blitzen-> select * from foo;
some_id | anothrid | value | datecreated | datereplaced
----------+----------+-------+-------------------------+---------------------
2892473 | 2810329 | t | 2008-03-12 14:37:18.165 | 3000-01-01 12:00:00
(1 row)
Regards,
Tena Sakai
tsakai(at)gallo(dot)ucsf(dot)edu
-----Original Message-----
From: Jonah H. Harris [mailto:jonah(dot)harris(at)gmail(dot)com]
Sent: Wed 3/19/2008 3:39 PM
To: Tena Sakai
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] compare 2 tables in sql
On Wed, Mar 19, 2008 at 1:56 PM, Tena Sakai <tsakai(at)gallo(dot)ucsf(dot)edu> wrote:
> Is there a sql way to compare (in a diff/cmp sense)
> 2 tables? For example,
SELECT * FROM foo
EXCEPT
SELECT * FROM moo;
--
Jonah H. Harris, Sr. Software Architect | phone: 732.331.1324
EnterpriseDB Corporation | fax: 732.331.1301
499 Thornall Street, 2nd Floor | jonah(dot)harris(at)enterprisedb(dot)com
Edison, NJ 08837 | http://www.enterprisedb.com/
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