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* UPDATE table SET col = (SELECT ...)
@ 1998-12-30 17:01 Eric Marsden <emarsden@mail.dotcom.fr>
0 siblings, 0 replies; 3+ messages in thread
From: Eric Marsden @ 1998-12-30 17:01 UTC (permalink / raw)
To: pgsql-sql
Hello,
If I understand the SQL references I have read, UPDATEs are allowed to
pull data from SELECT statements, something like
UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
SET col2 = (SELECT val2 FROM table WHERE id = 34)
WHERE id = 35;
However, the PostgreSQL parser chokes on the 'SELECT'. The
documentation says
UPDATE table SET column = expression [, ...]
[ FROM fromlist ]
[ WHERE condition ]
expression = A valid expression or value to assign to column.
I don't know exactly how to interpret `valid expression'.
--
Eric Marsden
emarsden @ mail.dotcom.fr
It's elephants all the way down
^ permalink raw reply [nested|flat] 3+ messages in thread
* UPDATE table SET col = (SELECT ...)
@ 2003-06-25 09:00 Vangelis-Maria Tougia <tougias@cytanet.com.cy>
2003-06-26 21:11 ` Re: UPDATE table SET col = (SELECT ...) Ian Barwick <barwick@gmx.net>
0 siblings, 1 reply; 3+ messages in thread
From: Vangelis-Maria Tougia @ 2003-06-25 09:00 UTC (permalink / raw)
To: pgsql-sql
Hi,
I found follwing email sent to you in internet.
I am interested in same issue myself.
Did you finally found out any more information about how to Update a column
of a table by selecting value from another table?
Hello,
If I understand the SQL references I have read, UPDATEs are allowed to
pull data from SELECT statements, something like
UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
SET col2 = (SELECT val2 FROM table WHERE id = 34)
WHERE id = 35;
However, the PostgreSQL parser chokes on the 'SELECT'. The
documentation says
UPDATE table SET column = expression [, ...]
[ FROM fromlist ]
[ WHERE condition ]
expression = A valid expression or value to assign to column.
I don't know exactly how to interpret `valid expression'.
--
Eric Marsden
emarsden @ mail.dotcom.fr
It's elephants all the way down
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: UPDATE table SET col = (SELECT ...)
2003-06-25 09:00 UPDATE table SET col = (SELECT ...) Vangelis-Maria Tougia <tougias@cytanet.com.cy>
@ 2003-06-26 21:11 ` Ian Barwick <barwick@gmx.net>
0 siblings, 0 replies; 3+ messages in thread
From: Ian Barwick @ 2003-06-26 21:11 UTC (permalink / raw)
To: Vangelis-Maria Tougia <tougias@cytanet.com.cy>; pgsql-sql
On Wednesday 25 June 2003 11:00, Vangelis-Maria Tougia wrote:
> Hi,
> I found follwing email sent to you in internet.
> I am interested in same issue myself.
> Did you finally found out any more information about how to Update a column
> of a table by selecting value from another table?
Not sure if this has been answered previously, but here goes:
> Hello,
>
> If I understand the SQL references I have read, UPDATEs are allowed to
> pull data from SELECT statements, something like
>
> UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
> SET col2 = (SELECT val2 FROM table WHERE id = 34)
^^^
> WHERE id = 35;
The second "SET" is not necessary or allowed and is causing the update to
fail.
Ian Barwick
barwick@gmx.net
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2003-06-26 21:11 UTC | newest]
Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
1998-12-30 17:01 UPDATE table SET col = (SELECT ...) Eric Marsden <emarsden@mail.dotcom.fr>
2003-06-25 09:00 UPDATE table SET col = (SELECT ...) Vangelis-Maria Tougia <tougias@cytanet.com.cy>
2003-06-26 21:11 ` Ian Barwick <barwick@gmx.net>
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