DAX | Date Diff

[Herchris7172]

Hello Team

Need your help on the below 

I have 2 Tables, one includes Dates, Revised Due Date 

Second is a Calender table Used to define my Selected-Date=SelectedValue(Calender[Date])

Need to Calculate the Date Diff. If Revised Due Date is Blank then DateDiff is between Date and Selected Date otherwise it will be Revised Due Date and Selected Date.

Am using a Column with sumx but only managing to get the sum of the DateDiff with Revised Due Date 

Column = SUMX(Sheet1,IF(ISBLANK(Sheet1[Revised Due Date]),DATEDIFF(Sheet1[Dates ],Sheet1[Selected-Date],MONTH),DATEDIFF(Sheet1[Dates ],Sheet1[Revised Due Date],MONTH)))

Any Advice

[v-yangliu-msft · Accepted solution]

Hi  @Herchris7172 ,

Here are the steps you can follow：

1. Create measure.

Measure =
var _select=SELECTEDVALUE('Calender'[Date])
var _if=
 IF(
    MAX('Table'[Revised Due Date]) =  BLANK(),
    DATEDIFF(
        MAX('Table'[Date]),_select,DAY),
    DATEDIFF(
       MAX('Table'[Revised Due Date]),_select,DAY))
return
DIVIDE(ABS(_if) ,30)

2. Result:

Best Regards,

Liu Yang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[Herchris7172]

Another way I found out is this 

_months_2 =

Var Due_Date = SELECTEDVALUE(Sheet1[Dates ])

Var Revise_Date = SELECTEDVALUE(Sheet1[Revised Due Date])

Var Results = IF(ISBLANK(Revise_Date), DATEDIFF(Sheet1[Selected-Date],Due_Date,MONTH),DATEDIFF(Sheet1[Selected-Date],Revise_Date,MONTH))

RETURN Results

[v-yangliu-msft]

Thanks for the reply from @lbendlin , please allow me to provide another insight: 

Hi  @Herchris7172 ,

Here are the steps you can follow：

1. Create measure.

Test =
var _select=SELECTEDVALUE('Calender'[Date])
var _table=
ADDCOLUMNS(
    ALL('Table'),"Datediff",
 IF(
    'Table'[Revised Due Date] =  BLANK(),
    DATEDIFF(
        'Table'[includes Dates],_select,MONTH),
    DATEDIFF(
       'Table'[Revised Due Date],_select,MONTH)))  
return
SUMX(
_table,[Datediff])

2. Result:

Best Regards,

Liu Yang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly

[Herchris7172]

Thanks for the Reply but am Expecting results like the below. This is in Excel

[lbendlin]

Read about how to use COALESCE to test for BLANK() and replace it with other values like "TODAY()".