From: operationsengineer1@yahoo.com
To: pgsql-sql@postgresql.org <pgsql-sql@postgresql.org>
Subject: Using Query Result in WHERE Clause
Date: Fri, 2 Jun 2006 13:06:40 -0700 (PDT)
Message-ID: <20060602200640.91950.qmail@web33304.mail.mud.yahoo.com> (raw)
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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To: pgsql-sql@postgresql.org
Cc: operationsengineer1@yahoo.com
Subject: Re: Using Query Result in WHERE Clause
In-Reply-To: <20060602200640.91950.qmail@web33304.mail.mud.yahoo.com>
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