| From: | Alex Ignatov <a(dot)ignatov(at)postgrespro(dot)ru> |
|---|---|
| To: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Subquery uses ungrouped column |
| Date: | 2016-05-26 16:02:15 |
| Message-ID: | 68c84834-70a5-a707-d74a-e0cde953d470@postgrespro.ru |
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| Lists: | pgsql-general |
Hello!
Why the following query:
SELECT (select msc_id
from collectors
where id = substring(fileid from -1)
) msc_id
from ip_data_records
group by substring(fileid from -1)
gives me:
ERROR: subquery uses ungrouped column "ip_data_records.fileid" from
outer query
LINE 3: where id = substring(fileid from -1)
but the following query:
SELECT (select msc_id
from collectors
where id = fileid
) msc_id
from ip_data_records
group by fileid
is working ok?
--
Alex Ignatov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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