Re: SQL Question - Almost, Not Quite... - Mailing list pgsql-novice

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Subject Re: SQL Question - Almost, Not Quite...
Date
Msg-id 20060525205609.61883.qmail@web33313.mail.mud.yahoo.com
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In response to Re: SQL Question  (Bruno Wolff III <bruno@wolff.to>)
Responses Re: SQL Question - Almost, Not Quite...
List pgsql-novice
> On Wed, May 24, 2006 at 15:06:53 -0700,
>   operationsengineer1@yahoo.com wrote:
> >
> > given this structure, and hopefully i've
> communicated
> > it well enough, i'm concerned that it might be
> > difficult to weed out qa 1 fail followed by qa 2
> pass.
> >
> > that is...
> >
> > qa test 1
> > fail
> >
> > ... the bizrre happens ...
> >
> > qa test 2
> > pass
> >
> > how can i go about finding the qa test 1 failure?
> >
> > if i did a inspect_date descending query with a
> limit
> > of 1, i'd get a pass and miss the failure.
>
> Use "inspect_pass" in the WHERE clause.

Bruno, i don't understand how this would help my
situation, but i think the problem is that i poorly
communicated the original problem.  ;-)

however, i am very close to what i want...  but not
quite there.

i use this query...

SELECT t_inspect_result.inspect_result,
t_inspect.inspect_id
FROM t_inspect_result, t_inspect, t_inspect_area,
     t_serial_number,
t_link_contract_number_job_number, t_job_number,
t_product
WHERE  t_inspect.inspect_area_id =
       t_inspect_area.inspect_area_id
AND t_inspect.serial_number_id =
    t_serial_number.serial_number_id
AND t_serial_number.link_contract_number_job_number_id
=

t_link_contract_number_job_number.link_contract_number_job_number_id
AND t_link_contract_number_job_number.job_number_id =
    t_job_number.job_number_id
AND t_product.product_id =
    t_job_number.product_id
AND t_inspect.inspect_id =
    t_inspect_result.inspect_id
AND t_inspect.serial_number_id = '184'
GROUP BY t_inspect_result.inspect_timestamp,
t_inspect_result.inspect_result, t_inspect.inspect_id
ORDER BY t_inspect_result.inspect_timestamp desc

to get these results...

Row / inspect_result / inspect_id
1 / t / 107
2 / t / 106
3 / f / 100
4 / t / 100

i can't figure out how to group by
t_inspect.inspect_id and limit the query to one result
per inspect_id.

iow, i want to see...

Row / inspect_result / inspect_id
1 / t / 107
2 / t / 106
3 / f / 100

when i apply a limit 1, it returns a single result,
not a single result per inspect_id.  i tried (), but
to no avail.

any guidance is, as always, much appreciated.

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