Power Bi：if Condition with multiple cases specialized with date = NULL or SYSDATE

Question

我有一个 table 包含这些列 shipped_date、Promise_date

示例（假设当前日期是今天的日期“20/6/2019”）：

Shipped_date        Promise_date
20/1/2019           15/1/2019
Null                19/6/2019
Null                25/6/2019

我怎样做一个给出输出的 if 条件

1- if shipped_date = null and promise_date < today's date then "yes"

2- if shipped_date = null and promise_date >= today's date then "no"

我尝试编写 Dax 代码，但在 shipped_date 具有价值且 promise_date 不是今天的日期

时，我在另一种情况下成功了

if [JC_ShippedDate] < [PromiseDate] then "Completed early"
else if [JC_ShippedDate] > [PromiseDate] then "Completed behind schedule"
else if [JC_ShippedDate] = [PromiseDate] then "Completed on time" else "open"

错误是

Expression.Error: We cannot convert the value null to type Logical.
Details:
    Value=
    Type=Type

Answer 1

不确定您要找的到底是什么，但在 DAX 中，像这样的东西就可以了：

Test =
VAR Today =
    NOW ()
RETURN
    SWITCH (
        TRUE (),
        AND ( ISBLANK ( 'Table'[Shipped_Date] ), 'Table'[Promise_Date] < Today ), "Yes",
        AND ( ISBLANK ( 'Table'[Shipped_Date] ), 'Table'[Promise_Date] >= Today ), "No",
        'Table'[Shipped_Date] > 'Table'[Promise_Date], "x"
    )

对您的数据进行测试后，我得到以下信息：

Power Bi：if Condition with multiple cases specialized with date = NULL or SYSDATE

Power Bi : if Condition with multiple cases specially with date = NULL or SYSDATE

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