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Article #159

Re: help with group by ..

#159
From: Karol Bieniaszewski
Date: Tue, 24 Jun 2008 11:46
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U�ytkownik "Karol Bieniaszewski" <liviuslivius@poczta.onet.pl> napisa� w 
wiadomo�ci news:4860b9cd@newsgroups.borland.com...
>
> U�ytkownik "Karol Bieniaszewski" <liviuslivius@poczta.onet.pl> napisa� w 
> wiadomo�ci news:48608627$1@newsgroups.borland.com...
>>
>> Uzytkownik "Wayne Niddery (TeamB)" <wniddery@chaffaci.on.ca> napisal w 
>> wiadomosci news:485fb1d8$1@newsgroups.borland.com...
>>> "Karol Bieniaszewski" <liviuslivius@poczta.onet.pl> wrote in message 
>>> news:485f842b@newsgroups.borland.com...
>>>>
>>>> sumary by day in one row per day
>>>>
>>>> tableA
>>>> ID Integer Primary key
>>>> DT DATE NOT NULL,
>>>> QU NUMERIC(18, 4),
>>>> PRICE NUMERIC(18, 2)
>>>>
>>>> tableB
>>>> ID Integer Primary key
>>>> DT DATE NOT NULL,
>>>> QU NUMERIC(18, 4),
>>>> PRICE NUMERIC(18, 2)
>>>>
>>>> i need some like
>>>> select
>>>> {A.DT or B.DT}, sum(A.QU), SUM(A.QU * A.PRICE), SUM(B.QU), SUM(B.QU * 
>>>> A.PRICE)
>>>> FROM
>>>> tableA
>>>> tableB
>>>>
>>>> GROUP BY {A.DT or B.DT ... ????}
>>>>
>>>> result should by like
>>>>
>>>> DT                 SUMA       WARTA    SUMB   WARTB
>>>> 2008-01-01   19               590            14          890
>>>> 2008-01-02   12               789             11         654
>>>
>>> Maybe I'm not understanding what you want, but I think this should be 
>>> doable with an inner join linked on the date
>>>
>>> select a.dt, sum(a.qu), sum(a.qu * a.price), sum(b.qu), sum(b.qu * 
>>> b.price)
>>> from tablea a
>>> inner join tableb b on b.dt = a.dt
>>> group by a.dt
>>>
>>> However, this assumes there is the same number of records in both tables 
>>> for a given date. If there are different numbers of records then this 
>>> will give you wrong totals. In that case you would need to use 
>>> subqueries which will probably not perform well.
>>>
>>> You could create a view on each table that gets the correct sums for 
>>> that table by date, and then you can do the above query on those views 
>>> to get correct totals.
>>>
>> thanks Wayne i'll try views for this
>> in tables are not the same number of records
>> and some of thises tables in some month can be empty :/
>>
>> Karol Bieniasszewski
>
> Views can not be used to solve this
> becaouse of some empty month in one of the tables
> any more concept?
>
> Karol Bieniaszewski
i solved this with union and some trick with SUM

Karol Bieniaszewski 
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From: "Karol Bieniaszewski" <liviuslivius@poczta.onet.pl>
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Subject: Re: help with group by ..
Date: Tue, 24 Jun 2008 13:46:11 +0200
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