SQL server 累加求和

1.

SELECT SalesOrderID, ProductID, OrderQty
    ,SUM(OrderQty) OVER(PARTITION BY SalesOrderID) AS Total
    ,AVG(OrderQty) OVER(PARTITION BY SalesOrderID) AS "Avg"
    ,COUNT(OrderQty) OVER(PARTITION BY SalesOrderID) AS "Count"
    ,MIN(OrderQty) OVER(PARTITION BY SalesOrderID) AS "Min"
    ,MAX(OrderQty) OVER(PARTITION BY SalesOrderID) AS "Max"
FROM Sales.SalesOrderDetail 
WHERE SalesOrderID IN(43659,43664);

2.

select SchSno,convert(varchar(10),a.Dates,120) Dates,
sum(Amt_avail) over(partition by SchSno order by convert(varchar(10),a.Dates,120)) as PeriodPreAmt
from jr_creditUserAcct a