使用分区获取工作中心的运行平衡

Question

我正在编写一个将在SQL Server 2014上运行的脚本。

我有一张记录从一个工作中心到另一个工作中心的转账的交易表。简化表如下：

DECLARE @transactionTable TABLE (wono varchar(10),transferDate date
                      ,fromWC varchar(10),toWC varchar(10),qty float)

INSERT INTO @transactionTable
SELECT '0000000123','5/10/2018','STAG','PP-B',10
UNION
SELECT '0000000123','5/11/2018','PP-B','PP-T',5
UNION
SELECT '0000000123','5/11/2018','PP-T','TEST',3
UNION
SELECT '0000000123','5/12/2018','PP-B','PP-T',5
UNION
SELECT '0000000123','5/12/2018','PP-T','TEST',5
UNION
SELECT '0000000123','5/13/2018','PP-T','TEST',2
UNION
SELECT '0000000123','5/13/2018','TEST','FGI',8
UNION
SELECT '0000000123','5/14/2018','TEST','FGI',2

SELECT *, 
    fromTotal = -SUM(qty) OVER(PARTITION BY fromWC ORDER BY wono, transferdate, fromWC),
    toTotal = SUM(qty) OVER(PARTITION BY toWC ORDER BY wono, transferdate, toWC)
FROM @transactionTable
ORDER BY wono, transferDate, fromWC

我希望在每次交易后获得fromWC和toWC的运行余额。

鉴于上述记录，最终结果应为：

我相信可以使用SUM(qty) OVER(PARTITION BY...，但我不确定如何编写语句。当我尝试增加和减少时，每一行总是得到0。

如何编写SUM语句以达到预期效果？

更新

此图片显示每笔交易，即生成的WC数量，并突出显示每笔交易的相应from和to工作中心。

例如，查看5/11的第二条记录，3从PP-T转移到TEST。交易完成后，PP-B中有5个，PP-T中有2个，TEST中有3个。

Answer 1

我可以接近，除了开始余额：

SELECT  wono, transferDate, fromWC, toWC, qty,
    SUM( CASE WHEN WC = fromWC THEN RunningTotal ELSE 0 END ) AS FromQTY,
    SUM( CASE WHEN WC = toWC THEN RunningTotal ELSE 0 END ) AS ToQTY
FROM( -- b
    SELECT *, SUM(Newqty) OVER(PARTITION BY WC ORDER BY wono,transferdate, fromWC, toWC) AS RunningTotal
    FROM(-- a
            SELECT wono, transferDate, fromWC, toWC, fromWC AS WC, qty, -qty AS Newqty, 'From' AS RecType
            FROM @transactionTable
            UNION ALL
            SELECT wono, transferDate, fromWC, toWC, toWC AS WC, qty, qty AS Newqty, 'To' AS RecType
            FROM @transactionTable
        ) AS a
    ) AS b
GROUP BY wono, transferDate, fromWC, toWC, qty

我的逻辑假设所有余额都从0开始，因此“STAG”余额将为-10。

查询的工作原理：

1. “Unpivot”将输入记录设置为“From”和“To”记录，其中“From”记录的数量为“
”。
2. 计算每个“WC”的运行总计。
3. 将“Unpivoted”记录合并为原始形状

解决方案2

WITH CTE
AS(
SELECT *,
    ROW_NUMBER() OVER( ORDER BY wono, transferDate, fromWC, toWC ) AS Sequence
FROM @transactionTable
 ),
 CTE2
 AS( 
 SELECT *,
    fromTotal = -SUM(qty) OVER(PARTITION BY fromWC ORDER BY Sequence),
    toTotal = SUM(qty) OVER(PARTITION BY toWC ORDER BY Sequence)
FROM CTE
 )
SELECT a.Sequence, b.Sequence, c.Sequence, a.wono, a.transferDate, a.fromWC, a.toWC, a.qty, a.fromTotal + ISNULL( b.toTotal, 0 ) AS FromTotal, a.toTotal + ISNULL( c.fromTotal, 0 ) AS ToTotal
FROM CTE2 AS a
    OUTER APPLY( SELECT TOP 1 * FROM CTE2 WHERE wono = a.wono AND Sequence < a.Sequence AND toWC = a.fromWC ORDER BY Sequence DESC ) AS b
    OUTER APPLY( SELECT TOP 1 * FROM CTE2 WHERE wono = a.wono AND Sequence < a.Sequence AND fromWC = a.toWC ORDER BY Sequence DESC ) AS c
ORDER BY a.Sequence

注意：此解决方案可以从“ID”列中获益，它反映了交易顺序，或者至少需要wono, transferDate, fromWC, toWC上的索引