Re: Update field to a column from another table

> -----Original Message-----
> From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of
> drum.lucas@gmail.com
> Sent: Donnerstag, 21. April 2016 07:10
> To: Postgres General <pgsql-general@postgresql.org>
> Subject: [GENERAL] Update field to a column from another table
>
> I've got two tables:
>
> - ja_jobs
> - junk.ja_jobs_23856
>
> I need to update the null column ja_jobs.time_job with the data from the table  junk.ja_jobs_23856
>
> So I'm doing:
>
>
>       UPDATE public.ja_jobs AS b
>       SET   time_job = a.time_job
>       FROM junk.ja_jobs_23856 AS a
>       WHERE a.id  =

​b.id​

>       AND a.clientid = b.clientid;
>
>
> But it's now working... I'm using PostgreSQL 9.2
>
> Do you guys have an idea why?
>

​

​

On Wed, Apr 20, 2016 at 10:53 PM, Charles Clavadetscher <clavadetscher@swisspug.org> wrote:

Hi

This could work:

UPDATE public.ja_jobs
SET time_job = a.tj
FROM
(
  SELECT id AS rid,
         clientid AS cid,
         time_job AS tj
  FROM junk.ja_jobs_23856
) AS a
WHERE a.rid = id
AND a.cid = clientid;

In the subselect a you need to rename the column names to avoid ambiguity.