Sql server OVER（order by）语句中的Where子句？

我有一个临时表，其中填充了如下各种产品：

    DECLARE @temp TABLE (ID int, productCode int, quantity int, Available bit, RunningTotal int)
    INSERT INTO @temp (ID, productCode, quantity, Available, RunningTotal)
    SELECT
        item.ID
        , item.ProductCode
        , item.Quantity
        , item.available
        , SUM(item.Quantity) OVER (Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)
    FROM dbo.item

LineID  | ProductCode |  Quantity  | Available | RunningTotal
001     |    00001    |    2       |    3      |     null
002     |    00002    |    2       |    3      |     null      
003     |    00001    |    2       |    3      |     2   

SUM(item.Quantity) OVER (PARTITION BY ProductID, Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)

这就形成了这样的表格：

LineID  | ProductCode |  Quantity  | Available | RunningTotal
001     |    00001    |    2       |    3      |     null
002     |    00002    |    2       |    3      |     2      
003     |    00001    |    2       |    3      |     4   

我现在遇到的问题是，我希望运行总数只计算匹配的产品ID，但它将添加每个产品。该表应如下所示：

    DECLARE @temp TABLE (ID int, productCode int, quantity int, Available bit, RunningTotal int)
    INSERT INTO @temp (ID, productCode, quantity, Available, RunningTotal)
    SELECT
        item.ID
        , item.ProductCode
        , item.Quantity
        , item.available
        , SUM(item.Quantity) OVER (Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)
    FROM dbo.item

LineID  | ProductCode |  Quantity  | Available | RunningTotal
001     |    00001    |    2       |    3      |     null
002     |    00002    |    2       |    3      |     null      
003     |    00001    |    2       |    3      |     2   

SUM(item.Quantity) OVER (PARTITION BY ProductID, Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)

但我似乎不知道如何将此行更改为仅按productID分组

SUM（item.Quantity）（按item.productCode行排序，在无界的前一行和前一行之间）

更改为

Group By

将阻止我使用

ROWS BETHEN

子句。

---

我不想求

SUM

distinct item.quantity值，但我无法将其更改为distinct item.productCode值，因为我需要求和数量。我不确定Order By之后的

WHERE

条件可以使用什么语法，但我认为这可能是一个开始？

尝试按ProductID进行分区，如下所示：

    DECLARE @temp TABLE (ID int, productCode int, quantity int, Available bit, RunningTotal int)
    INSERT INTO @temp (ID, productCode, quantity, Available, RunningTotal)
    SELECT
        item.ID
        , item.ProductCode
        , item.Quantity
        , item.available
        , SUM(item.Quantity) OVER (Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)
    FROM dbo.item

LineID  | ProductCode |  Quantity  | Available | RunningTotal
001     |    00001    |    2       |    3      |     null
002     |    00002    |    2       |    3      |     null      
003     |    00001    |    2       |    3      |     2   

SUM(item.Quantity) OVER (PARTITION BY ProductID, Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)

---

尝试按ProductID进行分区，如下所示：

    DECLARE @temp TABLE (ID int, productCode int, quantity int, Available bit, RunningTotal int)
    INSERT INTO @temp (ID, productCode, quantity, Available, RunningTotal)
    SELECT
        item.ID
        , item.ProductCode
        , item.Quantity
        , item.available
        , SUM(item.Quantity) OVER (Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)
    FROM dbo.item

LineID  | ProductCode |  Quantity  | Available | RunningTotal
001     |    00001    |    2       |    3      |     null
002     |    00002    |    2       |    3      |     null      
003     |    00001    |    2       |    3      |     2   

SUM(item.Quantity) OVER (PARTITION BY ProductID, Order BY item.productCode ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING)

---

效果很好，只是我必须去掉条件之间的逗号

partitionbyitem.productCode orderbyitem.productCode

效果很好，只是我必须删除条件之间的逗号<代码>按项目划分。产品代码按项目排序。产品代码