SQL SUM和嵌套where子句

Question

我有一個SQL，它將一個ID，開始日期和結束日期作爲參數。然後我總結一下受where子句的限制。不過，我也需要總結同一列，不考慮數據參數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 

所以SUM（里程）作爲MileageTotal忽略where子句

Answer 1

消除where條款並進行有條件求和：

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

我還在from條款中添加過（可能是您不小心遺漏了它）。

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

到

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

您可能需要包括來自where條款更多條件句 - 我不知道你想要的總數。

Answer 2

試試這個：

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 

替換<table>與您的實際表名（之旅 ??? ）