From: Jean-Luc Lachance <jllachan@nsd.ca>
To: Matthew Price <pricem@juno.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Updating a table from another table
Date: Tue, 04 Jun 2002 17:38:19 -0400
Message-ID: <3CFD334B.5242BB1B@nsd.ca> (raw)
References: <20020604.163820.15423.68377@wm13.nyc.untd.com>
Try:
UPDATE customers
SET canceldate = cancels.canceldate
FROM cancels
WHERE customers.custnum = cancels.custnum;
You should also have an index on cancels(custnum).
JLL
Matthew Price wrote:
>
> Howdy All,
>
> I need to update many records in one table with data from another table that ultimately gets \copy-ed from an outside source.
>
> customers:
> custnum varchar(6),
> name text,
> canceldate date
> ...
>
> cancels:
> custnum varchar(6),
> canceldate date
>
> What is the right way to update the canceldate in the customers table from canceldate in the cancels table? Is there a way to use update to iterate rather than making a mass change?
>
> Thanks in advance,
> Matthew
>
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To: pgsql-sql@postgresql.org
Cc: jllachan@nsd.ca, pricem@juno.com
Subject: Re: Updating a table from another table
In-Reply-To: <3CFD334B.5242BB1B@nsd.ca>
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