Re: Combine data 2 records

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#726

From: MrT
Date: Mon, 06 Aug 2007 02:30

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Bill Todd wrote:
> MrT wrote:
> 
>> When I do:
>>
>> select id, max(CRDRPT_RNW) from mempay2
>> where id = 21
> 
> If there are columns in the SELECT clause that are not aggregates you
> must have a GROUP BY  clause and all of the non-aggregate columns must
> be included in the GROUP BY clause.
> 
> select id, max(CRDRPT_RNW) from mempay2
> where id = 21
> GROUP BY ID
> 
>> I get invalid column reference but this:
>>
>> select max(id), max(CRDRPT_RNW) from mempay2
>> where id = 21
> 
> In this case all of the columns in the SELECT clause are aggregates so
> the GROUP BY clause is not required.
> 


The id is the only one effectively GROUP BY.

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