问题出在这里：
首先我有一个嵌套查询，为此，我需要缩短执行时间并使其更快。想象一下，第一次时47秒，第二次是46/45秒。第二个是通过缓存运行的（第二个执行总是比第一次更快，但不是这样）。
第二，该查询在每个子选择中使用SUM，CAST，CASE。不能躲闪
第三我使用OPTION（FAST 500）从互联网上阅读了另一种解决方案。
这里是示例：
SELECT [cutomerSection],
SUM(DEBIT) AS DEBIT,
SUM(CREDIT) AS CREDIT,
SUM([OTHERS]) AS 'OTHERS'
FROM
(-- SECTOR A
SELECT cb.paymentGrp AS 'cutomerSection',
CASE
WHEN j.paymentStat = 'DEBIT' THEN SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*d.adm/100, 0) AS INT)) + SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*(d.fee-d.adm)/100, 0) AS INT))
ELSE 0
END AS 'DEBIT',
CASE
WHEN j.paymentStat = 'CREDIT' THEN SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*d.adm/100, 0) AS INT)) + SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*(d.fee-d.adm)/100, 0) AS INT))
ELSE 0
END AS 'CREDIT',
CASE
WHEN (j.paymentStat = ''
OR j.paymentStat IS NULL) THEN SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*d.adm/100, 0) AS INT)) + SUM(CAST(ISNULL(isnull(qty, 1)*(100-disc)*(d.fee-d.adm)/100, 0) AS INT))
ELSE 0
END AS 'OTHERS'
FROM tbactDetail d WITH(NOLOCK)
LEFT JOIN tbsectorSection j WITH(NOLOCK) ON d.tranCode = j.tranCode
LEFT JOIN tbact t ON (d.actCode=t.actCode
AND t.sectorCode = j.sectorCode)
LEFT JOIN tbCustomer c WITH(NOLOCK) ON c.custCode=j.custCode
LEFT JOIN tbfrontDesk a WITH(NOLOCK) ON a.struckNo=j.struk
LEFT JOIN tbpaymentList cb WITH(NOLOCK) ON cb.paymentK = a.paymentK
LEFT JOIN tbleading dc ON dc.leadCode = j.leadCode
LEFT JOIN tbsector p ON j.sectorCode = p.sectorCode
WHERE (j.deleted IS NULL
OR j.deleted = 0)
AND a.status = 'FINISH'
AND (j.tranDate BETWEEN '2018-11-01 00:00:00' AND '2018-11-01 23:59:59')
GROUP BY cb.paymentGrp,
j.paymentStat
UNION ALL -- SECTOR PARK
SELECT cb.paymentGrp AS 'cutomerSection',
CASE
WHEN t.paymentStat = 'DEBIT' THEN SUM(CAST(isnull(d.rate*d.qty*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'DEBIT',
CASE
WHEN t.paymentStat = 'CREDIT' THEN SUM(CAST(isnull(d.rate*d.qty*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'CREDIT',
CASE
WHEN (t.paymentStat = ''
OR t.paymentStat IS NULL) THEN SUM(CAST(isnull(d.rate*d.qty*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'OTHERS'
FROM tbparkDetail d
LEFT JOIN tbTranPark t ON d.tranCode = t.tranCode
JOIN tbsectorSection j ON t.strukPoli = j.struk
LEFT JOIN tbCustomer c WITH(NOLOCK) ON c.custCode=j.custCode
LEFT JOIN tbfrontDesk a WITH(NOLOCK) ON a.struckNo=j.struk
JOIN tbpaymentList cb ON a.paymentK = cb.paymentK
LEFT JOIN tbleading dc ON dc.leadCode=j.leadCode
LEFT JOIN tbsector p ON j.sectorCode=p.sectorCode
WHERE (j.deleted IS NULL
OR j.deleted=0)
AND (t.strukPoli IS NOT NULL
OR t.strukPoli <> ''
OR t.strukPoli <> '--')
AND a.status = 'FINISH'
AND (j.tranDate BETWEEN '2018-11-01 00:00:00' AND '2018-11-01 23:59:59')
GROUP BY cb.paymentGrp,
t.paymentStat
UNION ALL -- SECTOR FRONT
SELECT cb.paymentGrp AS 'cutomerSection',
CASE
WHEN t.paymentStat = 'DEBIT' THEN SUM(CAST(isnull(d.rate*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'DEBIT',
CASE
WHEN t.paymentStat = 'CREDIT' THEN SUM(CAST(isnull(d.rate*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'CREDIT',
CASE
WHEN (t.paymentStat = ''
OR t.paymentStat IS NULL) THEN SUM(CAST(isnull(d.rate*(100-disc)/100, 0) AS INT))
ELSE 0
END AS 'OTHERS'
FROM tbDetailRadioterapi d
LEFT JOIN tbtranFront t ON d.tranCode = t.tranCode
LEFT JOIN tbsectorSection j ON t.strukPoli = j.struk
LEFT JOIN tbCustomer c WITH(NOLOCK) ON c.custCode=j.custCode
LEFT JOIN tbfrontDesk a WITH(NOLOCK) ON a.struckNo = j.struk
LEFT JOIN tbpaymentList cb ON a.paymentK = cb.paymentK
LEFT JOIN tbleading dc ON dc.leadCode=j.leadCode
LEFT JOIN tbsector p ON j.sectorCode=p.sectorCode
WHERE (t.deleted IS NULL
OR t.deleted=0)
AND (strukPoli IS NOT NULL
OR strukPoli <>''
OR strukPoli <>'--')
AND a.status='FINISH'
AND (j.tranDate BETWEEN '2018-11-01 00:00:00' AND '2018-11-01 23:59:59')
GROUP BY cb.paymentGrp,
t.paymentStat) AS a
GROUP BY [cutomerSection]
第三次使用选项（快速500），我不知道为什么，但总是出错：
OPTION附近的错误语法
PS：对不起，我的英语不好