Calculating the running total - sql-server

Question

I want to calculate the running total using a Stored Procedure. The base Table is ~10.000 rows and is as follows:
nWordNr nBitNr tmTotals
------------------------
5 14 86404
5 14 146
2 3 438
10 2 3319
5 12 225
2 3 58
.... .... .....
.... .... .....
I want this to be GROUPED BY nWordNr, NBitNr and have the total tmTotals. To do this is started of with the following:
SELECT TOP 10
[nWordNr] as W,
[nBitNr] as B,
SUM([tmTotals]) as total,
COUNT(*) as Amount
FROM Messages_History
GROUP BY nWordNr, nBitNr
ORDER BY total desc
This results in:
W B total Amount
-----------------------
2 3 3578775 745
3 3 3557975 395
5 4 2305229 72
5 3 2183050 33
5 12 2022401 825
5 14 1673295 652
48 12 1658862 302
4 3 1606454 215
48 13 1541729 192
5 9 1463256 761
Now I want to calculate the running total on the column total like this:
W B total Amount running
-------------------------------
2 3 3578775 745 3578775
3 3 3557975 395 7136750
5 4 2305229 72 9441979
5 3 2183050 33 11625029
5 12 2022401 825 etc.
5 14 1673295 652 etc.
48 12 1658862 302 etc.
4 3 1606454 215 etc.
48 13 1541729 192 etc.
5 9 1463256 761 etc.
so what I found was:
COUNT([tmTotals]) over (ORDER BY [nWordNr], [nBitNr]) as Running
But here I get the error that is discussed in this question: Column invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause and I just can't figure out how to solve it in this case

Answer 1

it should be SUM ( SUM ( tmTotals) ) OVER ( ... )
SELECT TOP 10
[nWordNr] as W,
[nBitNr] as B,
SUM([tmTotals]) as total,
COUNT(*) as Amount,
SUM(SUM([tmTotals])) OVER (ORDER BY [nWordNr], [nBitNr]) as Running
FROM Messages_History
GROUP BY nWordNr, nBitNr
ORDER BY total desc
EDIT :
Looking at your expected result, the Running should be
SUM(SUM([tmTotals])) OVER (ORDER BY SUM([tmTotals]) DESC) as Running
if the above is a bit difficult to grasp, then you can use a CTE or derived table and perform the running total on the outer query
; with CTE as
(
SELECT
[nWordNr] as W,
[nBitNr] as B,
SUM([tmTotals]) as total,
COUNT(*) as Amount
FROM Messages_History
GROUP BY nWordNr, nBitNr
)
SELECT TOP 10 *,
SUM(total) OVER (ORDER BY total desc) as Running
FROM CTE
ORDER BY total desc