小编She*_*115的帖子

计算列的值何时确定？

• 何时取回值？
• 值什么时候改变？
• 其他时间？

我猜这是一个新手问题，因为我在搜索中没有找到任何东西。

执行计划作为查询

SELECT VP.Branch
     , VP.ROUTE AS Route
     , VP.SAPCustomerID
     , S.CustomerID
     , S.ProductID
     , S.Date
     -- Group by Customer
     , CustomerQuantity = SUM(S.Quantity) OVER (PARTITION BY VP.Branch, VP.ROUTE, VP.SAPCustomerID, S.ProductID, S.Date)
     , CustomerFourWeekSalesAvg = SUM(S.FourWeekSalesAvg) OVER (PARTITION BY VP.Branch, VP.ROUTE, VP.SAPCustomerID, S.ProductID, S.Date)
     -- Group by Route
     , SUM(S.Quantity) OVER (PARTITION BY VP.Branch, VP.ROUTE, S.ProductID, S.Date) AS RouteQuantity
     , RouteFourWeekSalesAvg = SUM(S.FourWeekSalesAvg) OVER (PARTITION BY VP.Branch, VP.ROUTE, S.ProductID, S.Date)
     -- Group by Branch
     , BranchQuantity = SUM(S.Quantity) OVER (PARTITION BY …