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 <michaeljmo...@gmail.com>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 <icestor...@hotmail.com> 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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>
>
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