SQL Server 2008 Running Total

Question

I'm aware this has been asked but I'm completely baffled.

Trying to run a running total by day using SQL Server 2008. Have looked at solutions elsewhere but would am still completely perplexed.

The below code shows Daily sales but I cannot make a running total fit. Have looked at the similar solutions here but no luck. Have looked at partition by, order by, CTE etc but I'm just not there yet with SQL.

Would appreciate help, my code is below. I know this only returns the total grouped by day...

SELECT
    dim_invoice_date.invoice_date AS 'Invoice Date',
    round(SUM(invoice_amount_corp),2) AS 'Sales'
FROM 
    fact_om_bud_invoice 
JOIN
    dim_invoice_date ON fact_om_bud_invoice.dim_invoice_date_key = dim_invoice_date.dim_invoice_date_key 
WHERE   
    dim_invoice_date.current_cal_month IN ('Current') 
    AND fact_om_bud_invoice.budget_code IN ('BUDGET') 
GROUP BY 
    dim_invoice_date.invoice_date
HAVING 
    ROUND(SUM(invoice_amount_corp), 2) <> 0
ORDER BY
    'Invoice Date'

This returns the output:

Invoice Date     Sales 
-----------------------
4/10/2016       24,132 
5/10/2016       15,849 
6/10/2016       24,481 
7/10/2016       10,243 
10/10/2016      42,398 
11/10/2016      24,187 

Required format is something like:

Invoice Date     Sales   Running Sales
-------------------------------------------
04/10/2016      24,132   24,132
05/10/2016      15,849   39,981 
06/10/2016      24,481   64,462
07/10/2016      10,243   74,705
10/10/2016      42,398   117,103
11/10/2016      24,187   141,290

dim_invoice_date is a numeric field, it's looking up a separate date table to display as date time.

Answer 1

For example, can use WITH common_table_expression

WITH cte AS
     (
       SELECT 
         ROW_NUMBER() OVER(ORDER BY h.[Date]) RowN,
         h.[Date],
         SUM(s.Quantity) q
       FROM   
         Sales s
           JOIN Headers h
             ON s.ID_Headers = h.ID
       WHERE  
         h.[Date] > '2016.10.31'
       GROUP BY
         h.[Date]
     )

SELECT 
  c.[Date],
  c.q,
  SUM(c1.q)
FROM   
  cte c
    JOIN cte c1
      ON c1.RowN <= c.RowN
GROUP BY
  C.[Date],
  c.q
ORDER BY
  c.[Date]