On 1/27/23 14:20, David G. Johnston wrote:
On Fri, Jan 27, 2023 at 1:59 PM Rob Sargent <robjsarg...@gmail.com> wrote:
I'm trying to craft SQL to invoke a sequence nextval once per
grouped value.
This seems like a very unusual usage of nextval/sequences...
with cleanup as (
select DISTINCT e.ma <http://e.ma>, coalesce(e.pa <http://e.pa>,
'fix') as pa from ...
), compute as (
select ma, pa, nextval(...) from cleanup
)
select * from compute ... -- do whatever else you want
So far I have this:
with husb as(
select e.ma <http://e.ma>, count(distinct coalesce(e.pa
<http://e.pa>, nextval('egogen')::text)) as mates
from emp_all_by3 e group by e.ma <http://e.ma> order by mates
)
select mates, count(*)
from husb
group by mates order by mates desc;
Your "order by mates" in the CTE is totally pointless and wasting
resources.
David J.
Yeah, it wasn't when that was the last bit executed...
Seems asking a sequence for an id isn't too unusual? Or are they
specifically intended for primary keys?
