SQL SUM and nested where clause - sql

Question

I have an SQL that takes an id, a start date and an end date as parameters. I then sum certain that are restricted by the where clause. However I need to also sum the same column that doesnt take into account the data params and calculates the total for a particular driver. For example:
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
So the SUM(Mileage) As MileageTotal ignores the where clause

Answer 1

Try this:
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
Replace < table > with your actual table name (Journey???)

Answer 2

Eliminate the where clause and do conditional summation:
Select Name,
SUM(case when Journey.DateCreated BETWEEN #startdate AND #enddate then Mileage
else 0
end) As MileageWeek,
SUM(Mileage) As MileageTotal
from Journey
I also added back in the from clause (presumably you left it out accidentally).
SUM(
CASE [Type]
WHEN 418 THEN Amount
ELSE 0
END
) AS DriverMileage,
to
sum(case when [type] = 418 and PMTS.DateCreated BETWEEN #sd AND #ed then amount
else 0
end) as DriverMileage
You may need to include more conditionals from the where clause -- I'm not sure which total you want.