From: | Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com> |
---|---|
To: | Kirk Wythers <kirk(dot)wythers(at)gmail(dot)com> |
Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: update table from a csv file |
Date: | 2012-12-27 16:39:00 |
Message-ID: | 50DC79A4.1090205@gmail.com |
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Lists: | pgsql-general |
On 12/27/2012 08:27 AM, Kirk Wythers wrote:
> I have been using COPY FROM to do a mass import of records from CSV files into a new database. I have discover however, a small number of records ( a few thousand) in one of the files that contain new data that needs to be added to the database, but on rows that have a primary key and have already been inserted (so I can't use COPY FROM because it violates the primary key).
>
> If the structure of the table is
>
> id data1 data2 data3
>
> and the structure of the CSV file is
>
> id data1 data2 data3
>
> and I need to update all the rows in data3 where the id = id.
>
> I have created a temporary table and used COPY FROM to load the update data into the temporary table. I seem to be stuck however. I thought I should be able to use the UPDATE command to update all columns and all rows the table.id = tmp_table.id
>
> Something like:
>
> UPDATE table FROM tmp_table WHERE table.id = tmp_table.id;
>
> Or am I completely off course?
No. Some questions though.
What version pf Postgres?
Is that the actual UPDATE statement, I see no SET?
Have you tried it?
If so and it failed what was the error?
>
--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com
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