Re: Non-aggregate values attached to aggregates?
| От | Klint Gore |
|---|---|
| Тема | Re: Non-aggregate values attached to aggregates? |
| Дата | |
| Msg-id | 41C20DD5326.DCDAKG@129.180.47.120 обсуждение |
| Ответ на | Non-aggregate values attached to aggregates? (Benjamin Smith <lists@benjamindsmith.com>) |
| Список | pgsql-general |
On Thu, 16 Dec 2004 13:38:19 -0800, Benjamin Smith <lists@benjamindsmith.com> wrote:
> I have a list of students, and a list of enrollment records, and I'm trying to
> get a list of students and their most recent enrollment/disenrollment dates.
just subselect the max date for the student_id in the where clause.
select students.name,
enrollments.start,
enrollments.finish
>from students, enrollments
where enrollments.students_id = students.id
and enrollments.start =
(select max(e1.start)
from enrollments e1
where e1.student_id = students.id)
klint.
+---------------------------------------+-----------------+
: Klint Gore : "Non rhyming :
: EMail : kg@kgb.une.edu.au : slang - the :
: Snail : A.B.R.I. : possibilities :
: Mail University of New England : are useless" :
: Armidale NSW 2351 Australia : L.J.J. :
: Fax : +61 2 6772 5376 : :
+---------------------------------------+-----------------+
В списке pgsql-general по дате отправления: