AVERAGE TOTALYTD给出错误的结果。 Power BI DAX

Question

我需要为Average Year To Date索赔计算Closed。如果我使用FILTER函数，那么它给我正确的结果：$ 3,507.74

AVG_YTD_Indemn_Closed =
CALCULATE (
    AVERAGE ( fact_Losses[PaidIdemnity] ),
    FILTER (
        fact_Losses,
        fact_Losses[DateEntered].[Year] = YEAR ( TODAY () )
            && fact_Losses[ClaimStatus] = "Closed"
    )
)

但如果我使用TOTALYTD函数然后由于某种原因我得到了不同的结果$ 4,702.31：

AVG_YTD_Indemn_Closed1 =
CALCULATE (
    TOTALYTD ( AVERAGE ( fact_Losses[PaidIdemnity] ), dim_Date[Date] ),
    fact_Losses[ClaimStatus] = "Closed"
)

为什么会有这么大的差异？函数TOTALYTD如何计算与FILTER不同的结果？

Answer 1

正如here所解释的那样，

TOTALYTD (
    <EXPRESSION>,
    <DATES>
    [, <FILTER>]
    [, <YEARENDDATE>]
)

相当于

CALCULATE (
    <EXPRESSION>,
    DATESYTD ( <DATES> [, <YEARENDDATE>] )
    [, <FILTER>]
)

所以你的TOTALYTD度量相当于

AVG_YTD_Indemn_Closed1 =
CALCULATE (
    CALCULATE(
        AVERAGE ( fact_Losses[PaidIdemnity] ),
        DATESYTD( dim_Date[Date] )
    ),
    fact_Losses[ClaimStatus] = "Closed"
)

如果你把你的日期关系理顺，我推荐这个版本，因为TOTALYTD无法容纳你将来可能需要的额外过滤器，如here所述：

AVG_YTD_Indemn_Closed1 =
CALCULATE (
    AVERAGE ( fact_Losses[PaidIdemnity] ),
    DATESYTD( dim_Date[Date] ),
    fact_Losses[ClaimStatus] = "Closed"
)