cumulative sum sql window function

stackoverflow.com › questions › 2120544 › how-to-get-cumulative-sum

The latest version of SQL Server (2012) permits the following.

SELECT 
    RowID, 
    Col1,
    SUM(Col1) OVER(ORDER BY RowId ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS Col2
FROM tablehh
ORDER BY RowId

SELECT 
    GroupID, 
    RowID, 
    Col1,
    SUM(Col1) OVER(PARTITION BY GroupID ORDER BY RowId ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS Col2
FROM tablehh
ORDER BY RowId

This is even faster. Partitioned version completes in 34 seconds over 5 million rows for me.

Thanks to Peso, who commented on the SQL Team thread referred to in another answer.

Answer from Gareth Adamson on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 2120544 › how-to-get-cumulative-sum

sql server - How to get cumulative sum - Stack Overflow

Top answer

1 of 4

I think for it to be a running Sum you need ORDER BY in your parenthesis. SUM(COLUMN) OVER (ORDER BY productid)

2 of 4

I think you need to move the AS. WITH testtable AS (..copy code here..) SELECT ..copy code here.. FROM testtable; I could be wrong. But that’s the first thing I spotted.

Discussions

sql server - Cumulative sum in SQL using window function - Stack Overflow

QTY STOCK RNK ID KEY CUM SUM 40 35 1 1 35 20 35 2 1 0 15 35 3 1 0 58 35 4 1 0 18 35 5 1 0 40 35 1 2 35 20 35 2 2 0 15 35 3 2 0 CUM SUM should be MIN(QTY, STOCK-SUM(all rows in cumsum before the cur... More on stackoverflow.com

stackoverflow.com

Cumulative sum or running sum

I think for it to be a running Sum you need ORDER BY in your parenthesis. SUM(COLUMN) OVER (ORDER BY productid) More on reddit.com

r/SQL

March 10, 2023

Replicating ROW BETWEEN INTERVAL sliding window frame in Snowflake

First off, thank you for the high quality question. In Snowflake, to do a sliding window cumulative sum you need to either: Perform a self-join Construct a "spine" that's populated with every account_id/date possible in the dataset I find that the former is good enough for small datasets. That would look like: SELECT orig.account_id, orig.transaction_id, orig.transaction_date, orig.amount, SUM(rolling.amount) AS rolling_24mo_sum FROM transactions as orig JOIN transactions as rolling ON orig.account_id = rolling.account_id AND rolling.transaction_date BETWEEN orig.transaction_date - INTERVAL '24 MONTHS' AND orig.transaction_date GROUP BY ALL u/fhoffa has an example on Stack Overflow here . More on reddit.com

r/snowflake

December 14, 2023

SQL Running total, reset when a column is a certain value?

;with ShiftStartSeq as ( select Login ,ShiftSeq = row_number() over (order by Login) from ScreenShotTable where LogoutReason = 'SHIFT START' ) ,ShiftEndSeq as ( select Logout ,ShiftSeq = row_number() over (order by Logout) from ScreenShotTable where LogoutReason = 'SHIFT END' ) ,FullShiftSeq as ( select ss.ShiftSeq, ss.Login, se.Logout from ShiftStartSeq ss join ShiftEndSeq se on ss.ShiftSeq = se.ShiftSeq ) ,ScreenShotTableGrouped as ( select sst.*, fs.ShiftSeq from ScreenShotTable sst join FullShiftSeq fs on sst.Login >= fs.Login and sst.Logout <= fs.Logout ) ,WithRunningTotal as ( select * ,RunningTotal = sum(loginDuration) over (partition by ShiftSeq order by Login) from ScreenShotTableGrouped ) select * from WithRunningTotal More on reddit.com

r/SQLServer

June 11, 2021

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