Sådan får du løbende summen af ​​en kolonne i sql server

hvis din RDBMS understøtter vinduesfunktion,

til SQL Server 2012

SELECT  Qty,
        SUM(Qty) OVER (ORDER BY Qty) AS CumulativeTOTAL
FROM    tableName

• SQLFiddle Demo

til SQL Server 2008

SELECT a.Qty, (SELECT SUM(b.Qty)
               FROM   TableName b
               WHERE  b.Qty <= a.Qty)
FROM   TableName a
ORDER  BY a.Qty;

• SQLFiddle Demo