Re: Having the sum of two queries

From: Achilleas Mantzios <achill(at)matrix(dot)gatewaynet(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: Having the sum of two queries
Date: 2007-07-16 11:15:44
Message-ID: 200707161415.45307.achill@matrix.gatewaynet.com
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Στις Δευτέρα 16 Ιούλιος 2007 14:06, ο/η Dani Castaños έγραψε:
> Hi all!
>
> I want to do something like this:
>
> SELECT status, COUNT( status ) AS total
> FROM users
> GROUP BY status
>
> UNION
>
> SELECT status, COUNT(status) AS total
> FROM imported_users
> GROUP BY status
>
>
> And have the result of both added.
>
> I've tried something like
>
> SELECT tot.status, COUNT(total)
> FROM( QUERY A UNION QUERY B ) AS tot
> GROUP BY tot.status
>
> But it doesn't works. It doesn't add the total columns with the same
> status...

It should also be UNION ALL, just in case some status'es are common in the 2
subqueries.

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--
Achilleas Mantzios

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