I tried this version of it and it ran for over 2 hours before I
stopped it...
SELECT *
FROM (SELECT persons.certified_burner_num, persons.last_name,
open_burn_requests.request_date,
open_burn_requests.certified_burn_flag,
open_burn_requests.acres,
ROW_NUMBER ()
OVER (PARTITION BY certified_burner_num ORDER BY
request_date DESC) r_num
FROM fmis.open_burn_requests, fmis.persons)
WHERE r_num < 2;
On Jan 6, 5:06 pm, Michael Moore <[email protected]> wrote:
> PS,
> this does not cover the case where a fireman has never been called out, but
> you didn't say you needed that. If so, let us know.
> Mike
>
> On Thu, Jan 6, 2011 at 2:03 PM, Michael Moore <[email protected]>wrote:
>
>
>
> > This should tell you what you need to do.
>
> > SELECT *
> > FROM (SELECT do.customer_id,
> > do.order_timestamp,
> > do.order_total,
> > ROW_NUMBER ()
> > OVER (PARTITION BY customer_id ORDER BY order_timestamp
> > DESC)
> > r_num
> > FROM demo_orders do)
> > WHERE r_num < 2;
>
> > Let me know if you need further explanation.
> > Regards,
> > Mike
>
> > On Thu, Jan 6, 2011 at 12:42 PM, crocboy25 <[email protected]> wrote:
>
> >> Hello Group,
>
> >> I have a table in Oracle that contains records for firemen. Each
> >> record contains information for everytime a fireman is called out.
> >> Each fireman has an ID(unique). What I am trying to do is pull the
> >> first min and second min(or max)for each fireman in terms of the date
> >> they were called out. Each fireman could be called out 100 times per
> >> year. I want to write a query which pulls the first two times each
> >> fireman was pulled out. I have found several different ways of doing
> >> this but it is always for a query written to pull back just one
> >> fireman at a time. I need it for each fireman...
>
> >> here is a sloppy example of what the data looks like...
>
> >> Fireman ID Called out date
> >> 1 02/02/2010
> >> 1 03/03/2009
> >> 1 02/13/2009
> >> 2 02/02/2010
> >> 3 03/03/2005
> >> 3 02/13/2006
> >> 4 02/02/2006
> >> 4 03/03/2007
> >> 4 02/13/2010
>
> >> I would want to pull out the 2 earliest dates for each ID
>
> >> Here is a query for what i have done so far which doesnt work well and
> >> I think only sort of works for just one fireman at a time:
>
> >> SELECT *
>
> >> FROM (SELECT
>
> >> persons.certified_burner_num,persons.last_name,open_burn_requests.request_date,
> >> open_burn_requests.certified_burn_flag,
> >> open_burn_requests.acres
> >> FROM fmis.open_burn_requests, fmis.persons
> >> WHERE (persons.pk = open_burn_requests.by_pers_fk)
> >> AND open_burn_requests.acres > 0
> >> AND open_burn_requests.request_date > TO_DATE ('01/01/2006
> >> 0:01:00', 'MM/DD/YYYY HH24:MI:SS')
> >> AND CERTIFIED_BURNER_NUM in
>
> >> (19870006,19870013,19870024,19870029,19870030,19870033,19870093,19870118,19870125,19870158,19870166,19870170,19870225,19870250)
> >> order by 3)
> >> WHERE ROWNUM<=2;
>
> >> Any help would be great appreciated.
>
> >> Lee
>
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