Jan Danielsson <jan(dot)danielsson(at)gmail(dot)com> writes:
> Essentially, I want:
> select dt,sum(amount) as asum where asum=(select max(asum) ...) group by dt
There are a couple ways you could do it:
* HAVING clause:
select dt,sum(amount) as asum
group by dt
having sum(amount) = (select max(asum) ...)
* ORDER BY/LIMIT:
select dt,sum(amount) as asum
group by dt
order by asum desc
limit 1
The first is standard SQL, the second isn't (no LIMIT in the spec)
but the second is probably more efficient.
regards, tom lane