Re: Select .. Having vs computer fields - Mailing list pgsql-general

On Wed, 12 Dec 2001, Javier Dussaillant wrote:

> At 12:54 PM 12/12/2001 -0500, Francisco Reyes wrote:
> >Can use use computed fields on the "having" part of select?
> >I have tried:
> >select a,b, count(*) as dups_count from some_table having dups_count > 1;
> >
> >and it gives me the error "Attribute 'dups_count' not found"
>
> You have to GROUP BY in order to use HAVING. For example:
>
> SELECT a,b, count(*) as dups_count FROM some_table GROUP BY a,b HAVING
> dups_count > 1;

My mistake for not including it in the example. I did use Group By.