On 9/26/16, Patrick B <patrickbakerbr@gmail.com> wrote:
> 2016-09-27 16:22 GMT+13:00 Patrick B <patrickbakerbr@gmail.com>:
> I'm doing this now:
>
> sel AS (
>> SELECT i.id AS c_id
>> FROM (select id, row_number() OVER (ORDER BY id) AS rn FROM ins_table_1)
>> i
>> JOIN rows s USING (rn)
>> )
>> UPDATE table_2 SET c_id =
>> (
>> SELECT c_id
>> FROM sel
>> ORDER BY c_id
>> )
>> WHERE clientid = 124312;
>
>
> But I get *ERROR: more than one row returned by a subquery used as an
> expression*
>
To update rows of one table by rows from another table you should use
UPDATE ... SET ... FROM ... WHERE ...
clause described in the docs[1] (see example around the sentence "A
similar result could be accomplished with a join:" and note below).
[1] https://www.postgresql.org/docs/devel/static/sql-update.html
--
Best regards,
Vitaly Burovoy