Re: WHERE on an alias

That was just an example.  My code doesn't use group by, it uses a subselect.  And I 
checked and having doesn't work with aliases either.

Stephan Szabo wrote:
> On Fri, 24 Aug 2001, Joseph Shraibman wrote:
> 
> 
>>playpen=# select a, sum(b) as dsum from taba where dsum > 5 group by(a);
>>ERROR:  Attribute 'dsum' not found
>>
>>Why can we GROUP BY on an alias but not do a WHERE on an alias?  I have a subselect that 
>>explain shows is being run twice if I have to put it in the WHERE clause.
>>
> 
> Somewhat unrelated question, are you sure you want where and not having?
> IIRC, where is going to select rows before things like the group by
> occur, and that doesn't seem to be what you'd want here, right?
> 


-- 
Joseph Shraibman
jks@selectacast.net
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