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* update column
@ 2012-02-09 01:58 ssylla <stefansylla@gmx.de>
0 siblings, 1 reply; 2+ messages in thread
From: ssylla @ 2012-02-09 01:58 UTC (permalink / raw)
To: pgsql-sql
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
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: update column
@ 2012-02-10 15:33 Oliveiros d'Azevedo Cristina <oliveiros.cristina@marktest.pt>
parent: ssylla <stefansylla@gmx.de>
0 siblings, 0 replies; 2+ messages in thread
From: Oliveiros d'Azevedo Cristina @ 2012-02-10 15:33 UTC (permalink / raw)
To: ssylla <stefansylla@gmx.de>; pgsql-sql
UPDATE admin
SET parent = SUBSTR(id,1,4);
Doesn't it do what you want?
Best,
Oliveiros
----- Original Message -----
From: "ssylla" <stefansylla@gmx.de>
To: <pgsql-sql@postgresql.org>
Sent: Thursday, February 09, 2012 1:58 AM
Subject: [SQL] update column
> 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.
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
^ permalink raw reply [nested|flat] 2+ messages in thread
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2012-02-09 01:58 update column ssylla <stefansylla@gmx.de>
2012-02-10 15:33 ` Oliveiros d'Azevedo Cristina <oliveiros.cristina@marktest.pt>
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