From: ssylla <stefansylla@gmx.de>
To: pgsql-sql@postgresql.org
Subject: update column
Date: Wed, 8 Feb 2012 17:58:05 -0800 (PST)
Message-ID: <1328752685274-5468330.post@n5.nabble.com> (raw)
Dear list,
sorry, I already posted this, but it did not seem to have been accepted by
the mailing list. So here's my second try:
I need to update all rows of a column ('parent') based on a subquery that
returns me the first four digits of another column ('id'):
UPDATE admin SET parent=(SELECT SUBSTR(id,1,4) FROM admin);
After executing, I get the following error-message:
"more than one row returned by a subquery used as an expressionmore than one
row returned by a subquery used as an expression"
I am not quite sure about that, but maybe I need to construct a
function/loop to fulfill this task?
thanks for help.
Stefan
--
View this message in context: http://postgresql.1045698.n5.nabble.com/update-column-tp5468330p5468330.html
Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-sql@postgresql.org
Cc: stefansylla@gmx.de
Subject: Re: update column
In-Reply-To: <1328752685274-5468330.post@n5.nabble.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox