Using Query Result in WHERE Clause - Mailing list pgsql-sql

hi all,

SUMMARY:

i want to replace

AND t_inspect.inspect_pass = 'f'

with a complex query that yields the same result.  the
complex query is in the form of...

SELECT DISTINCT ON (t_inspect.inspect_id)
t_inspect_result.inspect_result_pass,       t_inspect_result.inspect_result_id FROM t_inspect_result, t_inspect,
t_serial_number,
t_product, t_job_number,       t_link_contract_number_job_number,
t_inspect_area WHERE -- lots of noise here ORDER BY t_inspect.inspect_id,
inspect_result_timestamp DESC

can i do this?  if so, how?

DETAILED EXAMPLE:

i have the following query (please focus on the *key*
element, the rest of the query is just noise):

SELECT t_product.product_id, t_product.product_number,      t_serial_number.serial_number_id,
t_serial_number.serial_number,      t_inspect_result.inspect_result_id,
t_inspect_area.inspect_area || ', ' ||
t_inspect_result.inspect_result_timestamp::time
FROM t_product, t_job_number,
t_link_contract_number_job_number,    t_serial_number, t_inspect, t_inspect_area,
t_inspect_result
WHERE t_product.product_id = t_job_number.product_id
AND t_job_number.job_number_id =
t_link_contract_number_job_number.job_number_id
AND
t_link_contract_number_job_number.link_contract_number_job_number_id
=   t_serial_number.link_contract_number_job_number_id
AND t_serial_number.serial_number_id =
t_inspect.serial_number_id
AND t_inspect_area.inspect_area_id =
t_inspect.inspect_area_id
AND t_inspect.inspect_id = t_inspect_result.inspect_id

-- the statement below is *key*
AND t_inspect.inspect_pass = 'f'
-- the statement above is *key*

ORDER BY t_product.product_number ASC,
serial_number::integer ASC,
t_inspect_result.inspect_result_timestamp DESC

the purpose of the query is to a multi-dimensional
array to populate a series of linked select boxes. 
only those sets of values that haven't already passed
an inspection are listed, hence the 

AND t_inspect.inspect_pass = 'f'

line.

in order to be able to include...

AND t_inspect.inspect_pass = 'f'

...i had to repeat data (added inspect_pass column in
t_inspect) when that data already exists (the latest
date boolean value in
t_inspect_result.inspect_result_pass).

t_inspect.inspect pass records the current state of a
unit in inspection (pass or fail), while
t_inspect_result.inspect_result_pass records all
inspect results until a pass is achieved (eg, f, f, f,
f, f, f, f, f, t).

anyway, i want to incorporate a query that finds this
last date inspect_pass_result value and replace...

AND t_inspect.inspect_pass = 'f'

the query that pulls all the latest date values is...

SELECT DISTINCT ON (t_inspect.inspect_id)
t_inspect_result.inspect_result_pass,       t_inspect_result.inspect_result_id FROM t_inspect_result, t_inspect,
t_serial_number,
t_product, t_job_number,       t_link_contract_number_job_number,
t_inspect_area WHERE t_inspect_result.inspect_id =
t_inspect.inspect_id   AND t_inspect.serial_number_id =
t_serial_number.serial_number_id   AND t_product.product_id = t_job_number.product_id   AND t_job_number.job_number_id
=      
 
t_link_contract_number_job_number.job_number_id   AND
t_link_contract_number_job_number.link_contract_number_job_number_id
=      
t_serial_number.link_contract_number_job_number_id   AND t_serial_number.serial_number_id =
t_inspect.serial_number_id   AND t_inspect_area.inspect_area_id =
t_inspect.inspect_area_id   AND t_inspect.inspect_id =
t_inspect_result.inspect_id ORDER BY t_inspect.inspect_id,
inspect_result_timestamp DESC

tia...

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