On 4/3/2012 8:29 AM, rob@xxxxxxxxx wrote:
An alternative work around is to take this:

select client, min(childAge) as youngest, max(childAge) as eldest
from table group by client
having youngest< 20 and eldest> 20

and convert it to

With T1 as (
select client, min(childAge) as youngest, max(childAge) as eldest
from table group by client
)
Select client, youngest, eldest from T1
where youngest< 20 and eldest> 20

either should work - your choice.


Agreed. That's what I usually do when my grouping requirements start to get complex.

I love CTEs. I use them even when I don't strictly have to just to break apart a complex query so that I can debug it each step of the way.

Joe

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