我正在完成改进应用程序数据库查询的任务。这种重载加载查询大约需要3-5分钟才能完成，这是不可接受的。
以前的开发人员构建了这个查询，但他们并没有很好地完成这项工作。现在我在主查询中有一堆子查询，我必须改进。看起来那些孩子查询正在杀死它。
有人可以告诉我哪种方法最好吗？
SELECT
`j`.`id` AS `job_id`,
`j`.`job_number` AS `job_number`,
`j`.`job_status` AS `job_status`,
`j`.`job_registration_date` AS `job_registered`,
`j`.`created` AS `job_created`,
`q`.`quote_type_id` AS `quote_type_id`,
`qt`.`name` AS `quote_type_name`,
`q`.`created_by` AS `consultant_id`,
(SELECT
Concat(`pr`.`first_name`,
' ',
`pr`.`last_name`)
FROM
`profiles` `pr`
WHERE
(
`pr`.`user_id` = `q`.`created_by`
)) AS `consultant_name`,
`q`.`domain_id` AS `domain_id`,
`p`.`id` AS `package_id`,
`q`.`id` AS `quote_id`,
`q`.`client_id` AS `client_id`,
Concat(`c`.`title`,
' ',
`c`.`first_name`,
' ',
`c`.`last_name`) AS `client_name`,
`q`.`site_id` AS `site_id`,
`st`.`name` AS `site_name`,
Truncate(Abs(( `q`.`accepted_cost` / 1.1 )),
2) AS `est_sale`,
Coalesce((SELECT
Sum(`i`.`amount`)
FROM
`invoices` `i`
WHERE
( ( `i`.`void` <> 1 )
AND ( `i`.`job_id` = `j`.`id` ) )),
(SELECT
Sum(`i`.`amount`)
FROM
`invoices` `i`
WHERE
( ( `i`.`void` <> 1 )
AND ( `i`.`job_id` = `j`.`id` ) )),
0) AS `actual_sale`,
Coalesce((SELECT
Sum(( `pp`.`qty` * `pp`.`unit_price` ))
FROM
`package_products` `pp`
WHERE
( `pp`.`package_id` = `p`.`id` )),
(SELECT
Sum(( `pp`.`qty` * `pp`.`unit_price` ))
FROM
`package_products` `pp`
WHERE
( `pp`.`package_id` = `p`.`id` )),
0) AS `total_package_product`,
Coalesce((SELECT
Sum(( `ppt`.`qty` * `ppt`.`unit_price` ))
FROM
`package_parts` `ppt`
WHERE
( `ppt`.`package_id` = `p`.`id` )),
(SELECT
Sum(( `ppt`.`qty` * `ppt`.`unit_price` ))
FROM
`package_parts` `ppt`
WHERE
( `ppt`.`package_id` = `p`.`id` )),
0) AS `total_package_part`,
Coalesce((SELECT
Truncate(Abs(Sum(( ( `lc`.`number_of_technician` * `lc`.`hours` ) * `lc`.`hours_rate` ))),
2)
FROM
`labour_costs` `lc`
WHERE
( `lc`.`package_id` = `p`.`id` )),
(SELECT
Truncate( Abs( Sum(( ( `lc`.`number_of_technician` * `lc`.`hours` ) * `lc`.`hours_rate` ))),
2)
FROM
`labour_costs` `lc`
WHERE
( `lc`.`package_id` = `p`.`id` )),
0) AS `total_labor_cost`,
Coalesce((SELECT
Sum(( `pmi`.`qty` * `pmi`.`cost` ))
FROM
`package_misc_items` `pmi`
WHERE
( `pmi`.`package_id` = `p`.`id` )),
(SELECT
Sum(( `pmi`.`qty` * `pmi`.`cost` ))
FROM
`package_misc_items` `pmi`
WHERE
( `pmi`.`package_id` = `p`.`id` )),
0) AS `total_package_misc`,
`p`.`discount` AS `discount`,
Coalesce((SELECT
( CASE
WHEN ( Sum(`jf`.`amount`) <> 0 ) THEN Truncate(Abs( Sum(`jf`.`amount`)),
2)
ELSE NULL
end ) AS `acufile_amount`
FROM
((`acufiles` `a`
JOIN
`acufile_categories` `c`
ON(( `c`.`id` = `a`.`category_id` )))
JOIN
`job_files` `jf`
ON(( `jf`.`acufile_id` = `a`.`id` )))
WHERE
( ( `c`.`abbr` = 'CREDINV' )
AND ( `jf`.`job_id` = `j`.`id` ) )),
0) AS `total_acufile_amount`,
Coalesce((SELECT
Truncate(Abs(Sum(( `ts`.`hours` * `ef`.`e_total_hourly_rate` ))),
2)
FROM
((`timesheet_entries` `ts`
JOIN
`users` `u`
ON(( `ts`.`user_id` = `u`.`id` )))
JOIN
`employee_financials` `ef`
ON(( `ef`.`user_id` = `u`.`id` )))
WHERE
( `ts`.`job_id` = `j`.`id` )),
(SELECT
Truncate(Abs( Sum(( `ts`.`hours` * `ef`.`e_total_hourly_rate` ))),
2) AS `e_total_labor_timecost`
FROM
( (`timesheet_entries` `ts`
JOIN
`users` `u`
ON(( `ts`.`user_id` = `u`.`id` )))
JOIN
`employee_financials` `ef`
ON(( `ef`.`user_id` = `u`.`id` )))
WHERE
( `ts`.`job_id` = `j`.`id` )),
0) AS `total_labor_timecost`
FROM
(((((((`packages` `p`
JOIN
`quote_options` `qo`
ON(
(
`qo`.`id` = `p`.`quote_option_id`
)
)
)
JOIN
`quotes` `q`
ON(
(
`q`.`id` = `qo`.`quote_id`
)
)
)
JOIN
`quote_types` `qt`
ON(
(
`qt`.`id` = `q`.`quote_type_id`
)
)
)
JOIN
`jobs` `j`
ON(
(
`q`.`id` = `j`.`quote_id`
)
)
)
JOIN
`contacts` `c`
ON(
(
`c`.`id` = `q`.`client_id`
)
)
)
LEFT JOIN
`companies` `co`
ON(
(
`co`.`id` = `c`.`company_id`
)
)
)
LEFT JOIN
`sites` `st`
ON(
(
`q`.`site_id` = `st`.`id`
)
)
)
WHERE
(
`p`.`accepted` = 1
)
GROUP BY
`p`.`id`