cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
anongard
Helper I
Helper I

DATEDIFF with blank dates

Hello all,

 

I'm struggling hard with the datediff function right now. My problem is this:

 

I have two columns of dates, column A is a start date and column B is a finish date. Every column has a start date, but not every column has a finish date. I am trying to create a column C that has the age of the record. Using DATEDIFF=(column A, column B, DAY) will return the age in days of the columns with an end date, but since there are null values for those still ongoing, it returns nothing for them. I still need that age! Any thoughts on how to accomplish this?  

 

Thanks,

Alex

 

 

1 ACCEPTED SOLUTION
v-yuezhe-msft
Microsoft
Microsoft

@anongard,

What days do you want to return for those blank end dates? If you want to return the days between start date and today when the end date us blank, you can use the following DAX to calculate age of the record.

Column = IF(ISBLANK(Table[End Date]),DATEDIFF(Table[Start Date],TODAY(),DAY),DATEDIFF(Table[Start Date],Table[End Date],DAY))
1.PNG


Regards,

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

View solution in original post

4 REPLIES 4
v-yuezhe-msft
Microsoft
Microsoft

@anongard,

What days do you want to return for those blank end dates? If you want to return the days between start date and today when the end date us blank, you can use the following DAX to calculate age of the record.

Column = IF(ISBLANK(Table[End Date]),DATEDIFF(Table[Start Date],TODAY(),DAY),DATEDIFF(Table[Start Date],Table[End Date],DAY))
1.PNG


Regards,

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

View solution in original post

Thank you! Related, but more difficult question:

 

In PowerQuery, I'm trying to replicate this DAX function: TestCourse = IF(Courses[CompletedDate] > Courses[ActivationDate],TRUE,FALSE)

 

However, nothing I've tried in M has worked. I tried first with

 

= if Courses[CompletedDate] > Courses[ActivationDate]

then "TRUE"

else "FALSE" 

 

but I get errors about cyclic references and nothing very helpful to resolve it. If I could sort / filter in the DAX view that would be even better, but I suppose that's the entire point... 

 

Thanks,

Alex

@anongard,

I am not able to reproduce your issue. In Query Editor, add a custom column as shown in the following screenshot.
1.PNG2.PNG

Regards,

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

I was able to solve this with conditional columns, thankfully. I don't know why it worked for you though, I have literally the exact same thing typed in mine and I still get cyclic errors. Is there something that could be giving it trouble in the data? 

Helpful resources

Announcements
MBAS on Demand

2021 Release Wave 2 Plan

Power Platform release plan for the 2021 release wave 2 describes all new features releasing from October 2021 through March 2022.

July 2021 Update 768x460.png

Check it out!

Click here to read more about the July 2021 Updates

Power Query PA Forum 768x460.png

Check it out!

Did you know that you can visit the Power Query Forum in Power BI and now Power Apps

Urdu Hindi D365 Bootcamp 768x460.png

Urdu Hindi D365 Bootcamp

Dont miss our very own April Dunnam’s The Developer Guide to the Galaxy! Find out what the Power Platform has to offer for the traditional developer.

Top Solution Authors
Top Kudoed Authors