DAX IF 语句不能使用 Table 列

Question

我有以下 DAX 表达式：

Students_Who_Viewed = var max_report_date = TOPN(1,DISTINCT(table_a_Historical[ReportDate]),table_a_Historical[ReportDate])
var last_week_report_date = max_report_date - 2
/////
var this_week_student_viewed = CALCULATE(
    SUM(table_a_Historical[CntViewedByStudent_CY]),
    KEEPFILTERS(table_a_Historical[ReportDate] = max_report_date)
    )
/////
var last_week_student_viewed = CALCULATE(
    SUM(table_a_Historical[CntViewedByStudent_CY]),
    KEEPFILTERS(table_a_Historical[ReportDate] = last_week_report_date)
    )
/////
var students_viewed_wow_change = COALESCE(this_week_student_viewed,0) - COALESCE(last_week_student_viewed,0)
/////
RETURN

IF (
    **table_a_Historical[exempt_status_cy] = "exempt" || table_a_Historical[exempt_status_py],**
    "N/A",
    IF (
        students_viewed_wow_change > 0 //This means views this week is more than last week.
        ,1
        ,IF (
            students_viewed_wow_change < 0 //This means there were less views this week than last week
            ,-1
            ,0 //This value will be used if there is no change in views this week relative to last week.
            )
         )
    )

在**包围的部分，我一直收到错误信息。这些列在 table 中有效。这是为什么？

Answer 1

由于 DAX 搜索聚合，请在下面直接引用列名的地方试试这个：

min(table_a_Historical[exempt_status_cy])

希望这会奏效。

DAX IF 语句不能使用 Table 列

DAX IF Statement Can't Use Table Column

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