Re: Subselect with no records results in final empty set

It works as you sugested, this is the syntax I used:
SELECT * FROM
(SELECT 1 AS t1, 2 AS t2) AS t1
LEFT JOIN (SELECT * FROM atc WHERE id = '1231222') AS t2 ON (null)

Thank you.

------ Original Message ------
From: "David G Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Sent: 1/29/2015 10:03:38 PM
Subject: Re: [GENERAL] Subselect with no records results in final empty
set

>Sterpu Victor wrote
>> Hello
>>
>> I have this select where the last subselect will return a empty set
>>and
>> because of this the whole select will be empty.
>> How can I change this syntax so I will have a row result even if the
>> last select is empty?
>>
>> SELECT * FROM (SELECT 1 AS t1, 2 AS t2) as t, (SELECT 3 AS t3) as s,
>> (SELECT * FROM atc WHERE id = '1231222' LIMIT 1 OFFSET 0) AS s3;
>
>Use explicit join syntax; and then pick the "LEFT [OUTER] JOIN"
>variant.
>
>SELECT
>FROM t
>LEFT JOIN s3 ON (TRUE)
>
>David J.
>
>
>
>--
>View this message in context:
>http://postgresql.nabble.com/Subselect-with-no-records-results-in-final-empty-set-tp5836011p5836014.html
>Sent from the PostgreSQL - general mailing list archive at Nabble.com.
>
>
>--
>Sent via pgsql-general mailing list (pgsql-general(at)postgresql(dot)org)
>To make changes to your subscription:
>http://www.postgresql.org/mailpref/pgsql-general

---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com