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(at)selectacast(dot)net
Increase signal to noise ratio. http://www.targabot.com