我有三张桌子，financial_years，house_details，consumer_details。我在Sqlfiddle中添加了我的模式：http://sqlfiddle.com/#!9/dd527d/2并且由于下面给出的长度，我的预期结果被包装。我试过的查询是。
查询：
SELECT c.consumer_name as Name
,c.house_number
,c.address
,sum(CASE WHEN h.subincome = 'Garbage tax' THEN f.garbage_tax else 0 end) -
sum(CASE WHEN h.subincome = 'Garbage tax' THEN h.rupees else 0 END) as gtax
,sum(CASE WHEN h.subincome = 'House tax' THEN f.house_tax else 0 end) -
sum(CASE WHEN h.subincome = 'House tax' THEN h.rupees else 0 END) as htax,
,sum(CASE WHEN h.subincome = 'Light tax' THEN f.light_tax else 0 end) -
sum(CASE WHEN h.subincome = 'Light tax' THEN h.rupees else 0 END) as LTAX
from house_details h
INNER JOIN financial_year f ON h.financial_year = f.year
AND h.house_id = f.house_number
INNER JOIN consumer_details c ON h.house_id = c.house_number
AND h.financial_year != '2017-2018'
GROUP BY c.consumer_name
,c.house_number
,c.address
预期结果：
sid | name | house_no | address | arrears
---------------------------------------------------------------------
house_tax | light_tax | garbage_tax
---------------------------------------------------------------------
22 Bala 22 Mumbai 145 710 450
25 Kannan 25 Pune 704 803 630
2 Arul 2 Delhi 60 570 590
current | total
------------------------------------------------------------------------
house_tax | light_tax | garbage_tax | house_tax | light_tax | garbage_tax
------------------------------------------------------------------------
300 400 500 445 1110 950
550 567 543 1254 1370 1173
700 800 900 760 1370 1490
receipt_no | collection
------------------------------------------------------------------------
house_tax | light_tax | garbage_tax | house_tax | light_tax | garbage_tax
------------------------------------------------------------------------
312,313,314 309,310,311 288,304,308 400 540 484
407,408,409 404,405,406 401,402,403 921 915 905
410 - - 500 0 0
balance
------------------------------------
house_tax | light_tax | garbage_tax
------------------------------------
45 570 466
333 455 268
260 1370 1490
答案 0 :(得分：1)
如果数字大于您的预期，那么这里有解释和线索：
当JOINing时，中间行数会膨胀。随后的GROUP BY会缩小行数。问题是聚合（例如SUM()）是通过膨胀的行数来完成的。
所以诀窍是在执行SUMs之前执行JOIN。尝试像
SELECT ... -- probably no SUM() needed here
FROM ( SELECT financial_year, house_id,
SUM(...), SUM(...) ... FROM house_details
GROUP BY 1,2 ) AS h
JOIN ( SELECT year, house_number,
SUM(...), SUM(...) ... FROM financial_years
GROUP BY 1,2 ) AS f
ON h.financial_year = f.year
AND h.house_id = f.house_number
我认为最后你不需要GROUP BY。
您最后可能需要额外的JOIN来获取customer_name等。并选择ORDER BY customer_name。
答案 1 :(得分：1)
这就是我所拥有的。它产生了我认为的正确结果：
SELECT c.consumer_id, c.consumer_name, c.house_number, c.address,
SUM(GTAX) AS GTAX, SUM(HTAX) AS HTAX, SUM(LTAX) AS LTAX
FROM
(
SELECT c.address, c.consumer_id, c.consumer_name, c.house_number, hd.financial_year,
sum(ifnull(f.garbage_tax,0))-ifnull((SELECT SUM(RUPEES) RUPEES FROM house_details h WHERE hd.financial_year=h.financial_year and c.house_number=h.house_id and h.SUBINCOME='Garbage tax'),0) AS gtax,
sum(ifnull(f.house_tax,0))-ifnull((SELECT SUM(RUPEES) RUPEES FROM house_details h WHERE hd.financial_year=h.financial_year and c.house_number=h.house_id and h.SUBINCOME='House tax'),0) AS htax,
sum(ifnull(f.light_tax,0))-ifnull((SELECT SUM(RUPEES) RUPEES FROM house_details h WHERE hd.financial_year=h.financial_year and c.house_number=h.house_id and h.SUBINCOME='Light tax'),0) AS ltax
from consumer_details c
cross join (select distinct hd.financial_year from house_details hd where hd.financial_year<>'2017-2018') hd
LEFT OUTER JOIN financial_years f ON c.house_number=f.house_number and f.year=hd.financial_year
where c.house_number in (select h.house_id from house_details h)
group by consumer_id, consumer_name, c.house_number, hd.financial_year
) c
group by c.consumer_id, c.consumer_name, c.house_number, c.address
,c.house_number
,c.address
答案 2 :(得分：0)
借助Stackoverflow用户的支持，我找到了解决方案。
SELECT
sid,
NAME,
housenu AS house_number,
addr AS Address,
htax AS Arrear_housetax,
ltax AS Arrear_lighttax,
gtax AS Arrear_garbagetax,
chousetax AS Current_housetax,
clighttax AS Current_lighttax,
cgarbage AS Current_garbagetax,
htax + chousetax AS totalhousetax,
ltax + clighttax AS totallighttax,
gtax + cgarbage AS totalgarbagetax,
housetax_Ids,
Garbagetax_ids,
lighttax_Ids,
htax_collected AS Collected_housetax,
LTAX_collected AS Collected_lighttax,
gtax_collected AS Collected_garbagetax,
totalhousetax - htax_collected AS balance_housetax,
totallighttax - LTAX_collected AS balance_Lighttax,
totalgarbage - gtax_collected AS balance_garbagetax
FROM
(
SELECT
sid,
NAME,
housenu,
addr,
gtax,
htax,
ltax,
cgarbage,
chousetax,
clighttax,
gtax + cgarbage AS totalgarbage,
htax + chousetax AS totalhousetax,
ltax + clighttax AS totallighttax,
Garbagetax_ids,
lighttax_Ids,
housetax_Ids,
gtax_collected,
htax_collected,
LTAX_collected
FROM
(
SELECT
sid,
c.consumer_name AS NAME,
s.house_number AS housenu,
c.address AS addr,
SUM(
CASE WHEN subincome = 'garbage tax' THEN taxdue ELSE 0
END
) - SUM(
CASE WHEN subincome = 'garbage tax' THEN taxpaid ELSE 0
END
) AS gtax,
SUM(
CASE WHEN subincome = 'house tax' THEN taxdue ELSE 0
END
) - SUM(
CASE WHEN subincome = 'house tax' THEN taxpaid ELSE 0
END
) AS htax,
SUM(
CASE WHEN subincome = 'light tax' THEN taxdue ELSE 0
END
) - SUM(
CASE WHEN subincome = 'light tax' THEN taxpaid ELSE 0
END
) AS ltax,
cgarbage,
chousetax,
clighttax,
Garbagetax_ids,
lighttax_Ids,
housetax_Ids,
gtax_collected,
htax_collected,
LTAX_collected
FROM
(
SELECT
F.`house_number`,
F.`year`,
F.`house_tax` taxdue,
F.`createdAt`,
F.`updatedAt`,
IFNULL(h.subincome, 'house_tax') subincome,
IFNULL(H.RUPEES, 0) taxpaid
FROM
FINANCIAL_YEARS F
LEFT JOIN house_details H ON
H.HOUSE_ID = F.HOUSE_NUMBER AND H.SUBINCOME = 'house tax' AND f.year = h.financial_year
#where f.house_number = 22
UNION ALL
SELECT
F.`house_number`,
F.`year`,
F.`light_tax`,
F.`createdAt`,
F.`updatedAt`,
IFNULL(h.subincome, 'light tax'),
IFNULL(H.RUPEES, 0)
FROM
FINANCIAL_YEARS F
LEFT JOIN house_details H ON
H.HOUSE_ID = F.HOUSE_NUMBER AND H.SUBINCOME = 'light tax' AND f.year = h.financial_year
#where f.house_number = 2
UNION ALL
SELECT
F.`house_number`,
F.`year`,
F.`garbage_tax`,
F.`createdAt`,
F.`updatedAt`,
IFNULL(h.subincome, 'garbage tax'),
IFNULL(H.RUPEES, 0)
FROM
FINANCIAL_YEARS F
LEFT JOIN house_details H ON
H.HOUSE_ID = F.HOUSE_NUMBER AND H.SUBINCOME = 'garbage tax' AND f.year = h.financial_year
#where f.house_number = 2
) s
LEFT JOIN(
SELECT house_number,
IFNULL(garbage_tax, 0) AS cgarbage,
IFNULL(light_tax, 0) AS clighttax,
IFNULL(house_tax, 0) AS chousetax
FROM
financial_years
WHERE
YEAR = "2017-2018"
) Y
ON
s.house_number = Y.house_number
LEFT JOIN(
SELECT
house_id,
GROUP_CONCAT(garbagetax_Ids) AS Garbagetax_ids,
GROUP_CONCAT(lighttax_Ids) AS Lighttax_ids,
GROUP_CONCAT(housetax_Ids) AS Housetax_ids
FROM
(
SELECT
house_id,
CASE WHEN subincome = 'Garbage tax' THEN receipt_id
END AS garbagetax_Ids,
CASE WHEN subincome = 'Light tax' THEN receipt_id
END AS lighttax_Ids,
CASE WHEN subincome = 'House tax' THEN receipt_id
END AS housetax_Ids
FROM
house_details
) AS mm
GROUP BY
house_id
) f
ON
s.house_number = f.house_id
LEFT JOIN(
SELECT
house_id,
SUM(gtax) AS gtax_collected,
SUM(htax) AS htax_collected,
SUM(LTAX) AS LTAX_collected
FROM
(
SELECT
house_id,
CASE WHEN h.subincome = 'Garbage tax' THEN SUM(h.rupees) ELSE 0
END AS gtax,
CASE WHEN h.subincome = 'House tax' THEN SUM(h.rupees) ELSE 0
END AS htax,
CASE WHEN h.subincome = 'Light tax' THEN SUM(h.rupees) ELSE 0
END AS LTAX
FROM
house_details h
GROUP BY
house_id,
subincome
) AS main
GROUP BY
house_id
) cf
ON
s.house_number = cf.house_id
LEFT JOIN(
SELECT house_number AS sid,
consumer_name,
address
FROM
consumer_details
) c
ON
s.house_number = c.sid
WHERE
s.year <> '2017-2018'
GROUP BY
c.consumer_name,
s.house_number,
c.address
) az
) aa