| From: | Chris Curvey <chris(at)chriscurvey(dot)com> |
|---|---|
| To: | Arup Rakshit <aruprakshit(at)rocketmail(dot)com> |
| Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: converting a N rows table to a 1 row table ? |
| Date: | 2014-07-03 12:53:53 |
| Message-ID: | CADfwSsCN_YSvQmpNWaMrHousq-4ieKeH03Ph5D20NNXkvR1Mqw@mail.gmail.com |
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| Lists: | pgsql-general |
On Thu, Jul 3, 2014 at 8:30 AM, Arup Rakshit <aruprakshit(at)rocketmail(dot)com>
wrote:
> Hi,
>
> One query is producing the below table :-
>
> answer | count | avg
> a1 3 14
> a2 2 10
>
> How to convert this to a single row table ?
>
> count | avg_a1 | avg_a2
> 5 14 10
>
> Regards,
> Arup Rakshit
>
select count(*)
, avg(case when answer='a1' then whatever_value else null end) as avg_a1
, avg(case when answer='a2' then whatever_value else null end) as avg_a2
from my_table
--
I asked the Internet how to train my cat, and the Internet told me to get a
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