Re: How to summarize (and group) the result of a union?

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#171

From: Olivier Peter
Date: Tue, 01 Jul 2008 14:19

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I've been thinking about a view too, but i was still hoping for a more flexible solution. 

Thanks Bill.


"Bill Todd [TeamB]" <no@no.com> wrote:
>Olivier Peter wrote:
>
>> 
>> I want to make a sum of amount grouped by year, month, week and day
>> based on the result set of a union.  However, when i try the
>> following i get an error on line three token unknown SELECT.
>> 
>> SELECT YEAR, MONTH, WEEK, DAY, SUM(AMOUNT) FROM
>> (
>> SELECT YEAR, MONTH, WEEK, DAY, AMOUNT FROM TABLE1
>> UNION
>> SELECT YEAR, MONTH, WEEK, DAY, AMOUNT FROM TABLE2
>> )
>> GROUP BY YEAR, MONTH, WEEK, DAY
>> 
>> Any ideas how to make this work?
>
>InterBase does not support derived tables. Create a view with the UNION
>then select from the view. Unless you want duplicates dropped use UNION
>ALL for better performance.
>
>-- 
>Bill Todd (TeamB)

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