如何使用 DAX（直接查询）在 power bi 中获取度量的运行总和/累积总和

Question

我有一个简单的数据集，如下所示，其中 delta 是一个度量（不是列），它是需求和供应的差异。我想计算度量“delta”的运行总和，如下所示。运行总和需要在材料-位置周级别。

我试过了：

Cum =
var mat = MAX('table'[Material])
var pla = MAX('table'[Plant])
var pw =MAX('table'[PWk])
return
CALCULATE(
table[delta],
FILTER(
ALL(table),
'table'[Material]= mat && 'table'[Plant] <= pla && 'table'[PWk]<=pw
)
))
<>
material  location  week   demand   supply   delta(demand-supply)     running_sum??
123       1000      wk1        100    40                 60                   60
123       1000      wk2         40     30                 10                   70
123       2000      wk1         30     20                 10                   10
123       2000      wk2         40     15                 25                   35

please help. I am stuck with this and dont know`enter code here` where i am going wrong.

Answer 1

也许：

running_sum =
VAR Mat =
    MAX ( 'Table'[material] )
VAR Loc =
    MAX ( 'Table'[location] )
VAR Wk =
    MAX ( 'Table'[week] )
RETURN
    CALCULATE (
        [delta],
        FILTER (
            ALL ( 'Table' ),
            'Table'[material] = Mat
                && 'Table'[location] = Loc
                && 0 + SUBSTITUTE ( 'Table'[week], "wk", "" )
                    <= 0 + SUBSTITUTE ( Wk, "wk", "" )
        )
    )