SQL Server 2008 How do I sum rows that match in criteria

Question

This is what my table looks like:

RefNum	Year	CorrespVNum	Proceeds	BaseCost
12345	2019	54321	12345.69	10000.00
12345	2019	54321	500.69	6000.00
12345	2019	65432	12345.69	10000.00
12345	2019	65432	500.69	6000.00
23456	2020	33344	50000.00	15000.00
34567	2021	11155	521.00	1000.00
34567	2021	11155	17.00	800.00
34567	2021	11155	85.00	100.00

I want the result to look like this:

RefNum	Year	CorrespVNum	TotalProceeds	TotalBaseCost
12345	2019	54321	12846.38	16000.00
12345	2019	65432	12846.38	16000.00
23456	2020	33344	50000.00	15000.00
34567	2021	11155	623.00	1900.00

So the matching criteria are the Refnum, Year and CorrespVnum. I have been messing around with a CTE query and I can't seem to get it to work. It works if I only have 2 matching rows but if there are more than 2 then it doesn't work.

Does anyone have any idea how to do this?

Answer 1

you can try this, keep it simple:

with table_1 (Refnum,Year,CorrespVNum,Proceeds,BaseCost)
as
(
          Select '12345', '2019', '54321',12345.69,10000 
Union all Select '12345', '2019', '54321',500.69,6000 
Union all Select '12345', '2019', '65432',12345.69,10000
Union all Select '12345', '2019', '65432',500.69,6000 
Union all Select '34567', '2021', '33344',500000,15000 
Union all Select '34567', '2021', '11155',521,1000 
Union all Select '34567', '2021', '11155',17,800 
Union all Select '34567', '2021', '11155',85,100 
)
Select 
    RefNum,
    Year,
    CorrespVNum,
    Sum(BaseCost) as TotalCaseCost
from 
    table_1
group by 
    RefNum,
    Year,
    CorrespVNum

Answer 2

select   RefNum
        ,Year
        ,CorrespVNum
        ,sum(Proceeds) as TotalProceeds 
        ,sum(BaseCost) as TotalBaseCost
from     t
group by RefNum, Year, CorrespVNum

RefNum	Year	CorrespVNum	TotalProceeds	TotalBaseCost
12345	2019	54321	12845	16000
12345	2019	65432	12845	16000
23456	2020	33344	50000	15000
34567	2021	11155	623	1900

Fiddle