SQL SUM和嵌套where子句

Question

我有一個將id，開始日期和結束日期作為參數的SQL。 然后，我總結一下受where子句限制的某些內容。 但是，我還需要對不考慮數據參數的同一列求和，並計算特定驅動程序的總數。 例如：

SELECT DISTINCT
PMTS.VolunteerId,
PMTS.ChargeRate,
SUM(
CASE [Type]
  WHEN 418 THEN Amount
  ELSE 0
END
) AS DriverMileage,
SUM(
CASE [Type]
  WHEN 1000 THEN Amount
  ELSE 0
END
) AS GPMileage,
SUM(
CASE [Type]
  WHEN 1001 THEN Amount
  ELSE 0
END
) AS Reimbursements,
SUM(
CASE [Type]
  WHEN 1002 THEN Amount
  ELSE 0
END
) AS MobilePhoneCharges,
SUM(Mileage) AS TotalMileageWeek,
B.TotalMileage,
VOLS.Address1,
VOLS.Address2,
VOLS.Town,
ISNULL(VOLS.Surname, '') + ', ' + ISNULL(VOLS.Forename, '') AS SurnameForename ,
ISNULL(VOLS.County, '') + ' ' + ISNULL(VOLS.PostCode, '') AS CountyPostcode 
FROM dbo.vVolunteerPayments PMTS
INNER JOIN dbo.vVolunteers VOLS ON PMTS.VolunteerId = VOLS.VolunteerID
--total mileage
INNER JOIN (select VolunteerId, sum(Mileage) as TotalMileage 
      FROM dbo.vVolunteerPayments GROUP BY VolunteerId) b ON 
b.VolunteerID=PMTS.VolunteerId
WHERE 
PMTS.VolunteerId = @volunteerid 
AND 
PMTS.PaymentEventID = 0
AND
PMTS.DateCreated BETWEEN @sd AND @ed
GROUP BY 
PMTS.VolunteerId
,Address1
,Address2
,Town
,County
,PostCode
,Surname
,Forename
,B.TotalMileage
,PMTS.ChargeRate

因此，SUM（Mileage）As MileageTotal會忽略where子句

Answer 1

嘗試這個：

  Select 
    a.Name,
    SUM(Mileage) As MileageWeek,
    SUM(Mileage) As MileageTotal,
    b.TotMiles
    FROM <table> a
    JOIN (select name,sum(Mileage) as TotMiles 
          FROM <table> GROUP By name) b ON b.name=a.name
    WHERE
    Journey.DateCreated BETWEEN @startdate AND @enddate

將< table >替換為您的實際表名（ 旅程 ???）

Answer 2

消除where子句並進行條件求和：

Select Name,
       SUM(case when Journey.DateCreated BETWEEN @startdate AND @enddate then Mileage
                else 0
           end) As MileageWeek,
       SUM(Mileage) As MileageTotal
from Journey

我還添加了from子句（大概是您無意中忽略了它）。

SUM(
CASE [Type]
  WHEN 418 THEN Amount
  ELSE 0
END
) AS DriverMileage,

至

sum(case when [type] = 418 and PMTS.DateCreated BETWEEN @sd AND @ed then amount
         else 0
    end) as DriverMileage

您可能需要在where子句中包含更多條件-我不確定您想要的總數。