Re: FW: query optimization question

On Wednesday 06 Nov 2002 2:01 pm, terry@ashtonwoodshomes.com wrote:

> However, for the total deficiencies I am then splitting up the total into
> aging groups, eg <30, 30-60, 60-90, and >90 days old.  The query for that
> looks like the below.  But before I paste it in, I would like to optimize
> it, if I could do so with a group by clause I most certainly would, but I
> don't see how I can BECAUSE OF THE AGING BREAKDOWN:

[one sub-query per age-range]
>                 AND dt.days_old_start_date < {d '2002-10-07'}

>             ) AS def_count_less_30,

>                     AND dt.days_old_start_date >= {d '2002-10-07'}
>                     AND dt.days_old_start_date < {d '2002-09-07'}

>                 ) AS def_count_30_60,

Could you not define a function age_range(date) to return the relevant range
text, then group on that text? I've used that before.

--  Richard Huxton