Cumulative sum with conditions - tsql

Question

I tried to get cumulative sums throught column week (and if is possible, then get result ordered by column Datum$ADTE) in my query:
select
A.Castka "Amount",
'Cashflow' as N,
A.Datum$DATE "Datum",
cast(A.Rok as varchar(4)) + '-' + cast(A.Tyden as varchar(4)) "Week"
from iGateCashflow A
where
1 = 1
and A.BusTransaction_ID = '1D00000101'
and A.Vyjasneno = 'A'
and cast(datepart(week ,convert(date, dbo.ib_DateToString(Napocteno$DATE, 'dd.mm.yyyy'), 104)) as varchar(4))
= 44
In where clause are conditions, whichs will be edited througt external form.
I would like to get result like this (better without Amount column)
week N Amount Result
44 Cashflow 150 150
45 Cashflow 200 350
46 Cashflow 300 650
47 Cashflow 350 1000
I tried something like this, but I can't achieve my expected result:
select
sum(y.Amount),
Y.N,
Y.Week
from (
select
A.Castka "Amount",
'Cashflow' as N,
A.Datum$DATE "Datum",
cast(A.Rok as varchar(4)) + '-' + cast(A.Tyden as varchar(4)) "Week"
from iGateCashflow A
where
1 = 1
and A.BusTransaction_ID = '1D00000101'
and A.Vyjasneno = 'A'
and cast(datepart(week ,convert(date, dbo.ib_DateToString(Napocteno$DATE, 'dd.mm.yyyy'), 104)) as varchar(4))
= 44
) X
join (
select
A.Castka "Amount",
'Cashflow' as N,
cast(A.Rok as varchar(4)) + '-' + cast(A.Tyden as varchar(4)) "Week"
from iGateCashflow A
where
1 = 1
and A.BusTransaction_ID = '1D00000101'
and A.Vyjasneno = 'A'
and cast(datepart(week ,convert(date, dbo.ib_DateToString(Napocteno$DATE, 'dd.mm.yyyy'), 104)) as varchar(4))
= 44
) Y on Y.Week <= X.Week
group by
Y.N,
Y.Week
order by
Y.Week

Answer 1

I think there's more your question than what you showed. But use this as an idea (you'll need to add in WHERE conditions, etc)
SELECT *,
SUM(Amount) OVER (ORDER BY [week])
FROM iGateCashflow

Answer 2

Better to use OVER Clause to get Sum partition by Week and order by Date, please refer to
Over Clause

Answer 3

Maybe try something like this
select
cast(A.Rok as varchar(4)) + '-' + cast(A.Tyden as varchar(4)) "Week",
sum(B.Castka) "Total amount"
from iGateCashflow A
inner join iGateCashflow B
on A.BusTransaction_ID = B.BusTransaction_ID
and A.Vyjasneno = B.Vyjasneno
and B.week <= A.week --> if week is a calculated field, include the calculation here for both 'week's
where
1 = 1
and A.BusTransaction_ID = '1D00000101'
and A.Vyjasneno = 'A'
and cast(datepart(week ,convert(date, dbo.ib_DateToString(Napocteno$DATE, 'dd.mm.yyyy'), 104)) as varchar(4))
= 44
group by cast(A.Rok as varchar(4)) + '-' + cast(A.Tyden as varchar(4)) "Week"