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Thread: Get different sums from the same table in one query

Get different sums from the same table in one query

From
Dani Castaños
Date:
Hi all!

I want to put this three queries in only one... Take a look that the 
only thing that changes is the message_type_id. Any suggestions??
        SELECT TO_CHAR( statistics_date, 'DD/MM/YYYY') AS date_in, 
sum(total_num_messages)        FROM statistics_daily        WHERE message_type_id IN (4,5)        AND statistics_date =
CURRENT_DATE       AND telecom_operator_id <> 0        AND telephone_number IN ( $numbers )        GROUP BY date_in
 
        SELECT TO_CHAR( statistics_date, 'DD/MM/YYYY') AS date_in, 
sum(total_num_messages)        FROM statistics_daily        WHERE message_type_id IN (6)        AND statistics_date =
CURRENT_DATE       AND telecom_operator_id <> 0        AND telephone_number IN ( $numbers )        GROUP BY date_in
 
        SELECT TO_CHAR( statistics_date, 'DD/MM/YYYY') AS date_in, 
sum(total_num_messages)        FROM statistics_daily        WHERE message_type_id IN (21)        AND statistics_date =
CURRENT_DATE       AND telecom_operator_id <> 0        AND telephone_number IN ( $numbers )        GROUP BY date_in
 



Thank you in advance!

Re: Get different sums from the same table in one query

From
"A. Kretschmer"
Date:
am  Mon, dem 08.10.2007, um 12:49:04 +0200 mailte Dani Castaños folgendes:
> Hi all!
> 
> I want to put this three queries in only one... Take a look that the 
> only thing that changes is the message_type_id. Any suggestions??

Yes, no problem, You can use UNION (ALL) for such.


Andreas
-- 
Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID:   0x3FFF606C, privat 0x7F4584DA   http://wwwkeys.de.pgp.net

Re: Get different sums from the same table in one query

From
"Peter Childs"
Date:


On 08/10/2007, A. Kretschmer <andreas.kretschmer@schollglas.com> wrote:
am  Mon, dem 08.10.2007, um 12:49:04 +0200 mailte Dani Castaños folgendes:
> Hi all!
>
> I want to put this three queries in only one... Take a look that the
> only thing that changes is the message_type_id. Any suggestions??

Yes, no problem, You can use UNION (ALL) for such.


Not sure thats what he wants at all. Anyway Union all is going to produce a very slow way of doing this needing to go back to the data 3 times where as this only goes once.


 SELECT TO_CHAR( statistics_date, 'DD/MM/YYYY') AS date_in,
sum(case when message_type_id in (4,5) then total_num_messages else 0 end) as fourorfive,
sum(case when message_type_id in (6) then total_num_messages else 0 end) as six,
sum(case when message_type_id in (21) then total_num_messages else 0 end) as twentyone
        FROM statistics_daily
        WHERE statistics_date = CURRENT_DATE
        AND telecom_operator_id <> 0
        AND telephone_number IN ( $numbers )
        GROUP BY date_in

You may have to play to get exactly what you want but here worse case your only doing one scan of the table not three... You may want to use views to simplify things.

Peter Childs


Andreas
--
Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID:   0x3FFF606C, privat 0x7F4584DA   http://wwwkeys.de.pgp.net

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Re: Get different sums from the same table in one query

From
Richard Huxton
Date:
Dani Castaños wrote:
> Hi all!
>
> I want to put this three queries in only one... Take a look that the
> only thing that changes is the message_type_id. Any suggestions??
>
>         SELECT TO_CHAR( statistics_date, 'DD/MM/YYYY') AS date_in,
> sum(total_num_messages)
>         FROM statistics_daily
>         WHERE message_type_id IN (4,5)
>         AND statistics_date = CURRENT_DATE
>         AND telecom_operator_id <> 0
>         AND telephone_number IN ( $numbers )
>         GROUP BY date_in

Is this what you mean?

SELECT message_type_id, to_char...
...
WHERE message_type_id IN (4,5,6,21)
...
GROUP BY message_type_id, date_id



--   Richard Huxton  Archonet Ltd

Re: Get different sums from the same table in one query

From
"A. Kretschmer"
Date:
am  Mon, dem 08.10.2007, um 12:32:55 +0100 mailte Peter Childs folgendes:
> 
> 
> On 08/10/2007, A. Kretschmer <andreas.kretschmer@schollglas.com> wrote:
> 
>     am  Mon, dem 08.10.2007, um 12:49:04 +0200 mailte Dani Castaños folgendes:
>     > Hi all!
>     >
>     > I want to put this three queries in only one... Take a look that the
>     > only thing that changes is the message_type_id. Any suggestions??
> 
>     Yes, no problem, You can use UNION (ALL) for such.
> 
> 
> 
> Not sure thats what he wants at all. Anyway Union all is going to produce a
> very slow way of doing this needing to go back to the data 3 times where as
> this only goes once.

Right, conditional statements are a proper solution for this.


Andreas
-- 
Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID:   0x3FFF606C, privat 0x7F4584DA   http://wwwkeys.de.pgp.net