Question

我有一个名为T的表，它有三行如下....

Id   allocation   multiplier   multipliedallocation  multipliedallocationsum
1    20.000       1.0008       20.016                100.052
2    50.000       1.0006       50.030                100.052
3    30.000       1.0002       30.006                100.052

我想使用这个表来产生一些投影结果，这些结果会在几个月内改变分配，如下所示......

Id   allocation   multiplier   multipliedallocation  multipliedallocationsum  mnth
1    20.000       1.0008       20.016                100.052                  1
2    50.000       1.0006       50.030                100.052                  1
3    30.000       1.0002       30.006                100.052                  1
1    20.005       1.0008       20.021                100.050                  2
2    50.003       1.0006       50.033                100.050                  2
3    29.990       1.0002       29.996                100.050                  2
1    20.011       1.0008       20.027                100.052                  3
2    50.008       1.0006       50.038                100.052                  3
3    29.981       1.0002       29.987                100.052                  3
1    20.017       1.0008       20.033                100.054                  4
2    50.012       1.0006       50.042                100.054                  4
3    29.971       1.0002       29.979                100.054                  4

etc

任何行上的multipliedallocation =分配x乘数。

任何行上的multipliedallocationsum =该月份的乘法分配总和

月份n的分配是第n-1个月的乘法分配除以第n-1个月的乘数分数，乘以100

这是我到目前为止提出的递归cte SQL语句，但它并没有达到我的预期......

WITH Alloc (Id, allocation, multiplier, multipliedallocation, mnth)
AS
(
    SELECT Id, allocation, multiplier, allocation * multiplier AS multipliedallocation, 1 AS mnth
    FROM T
),
AllocProjected (Id, allocation, multiplier, multipliedallocation, multipliedallocationsum, mnth)
AS
(
    SELECT a.Id, a.allocation, a.multiplier, a.multipliedallocation,
    SUM(a.multpliedallocation) OVER (PARTITION BY a.Id, a.mnth), 1
    FROM Alloc a

    UNION ALL

    SELECT a.Id,
    CONVERT(decimal(6,3), (a.multipliedallocation / a.multipliedallocationsum) * 100.0) AS allocation,
    a.multiplier AS multiplier,
    a.multiplier,
    a.multiplier * (a.multipliedallocation / a.multipliedallocationsum) * 100.0 AS multipliedallocation,
    SUM(a.multipliedallocation) OVER (PARTITION BY a.mnth) AS multipliedallocationsum,
    a.mnth + 1
    FROM AllocProjected a
    WHERE a.mnth < 24
)
SELECT * FROM AllocProjected
ORDER BY mnth

multipliedallocationsum似乎只显示单行的乘法分配，而不是整月的乘法分配总和（即跨3行）

包含SUM的TSQL递归CTE

0 个答案: