Forum Discussion

Anonymous's avatar
Anonymous
Not applicable
7 years ago
Solved

Lookup value if date is between two dates

Hi   I'm new to PowerBI and the DAX syntax. I have 2 tables (Sprints and WorkItems). All date columns are formatted as Date   Sprints table: (columns StartDate, FinishDate and SprintNumber) ...
  • Anonymous's avatar
    Anonymous
    7 years ago

    I don't think you've told us all about the model... I suspect there are relationships between the two tables based on the date fields.

     

    Try this

    CreatedInSprint =
var __date = WorkItems[fields_SystemCreatedDate]
return
	MAXX(
		FILTER(
			Sprints;
			AND(
		    	Sprints[attributes_startDate] <= __date,
		    	__date <= Sprints[attributes_finishDate]
		    )
		),
		Sprints[SprintNo]
	)

    This should work correctly on the assumption that there is always at most one sprint returned by the logical condition in FILTER. If there happen to be many, then the maximum SprintNo will be returned.

     

    Best

    Darek

Anonymous's avatar
Anonymous
Not applicable
7 years ago

Hi Darek

 

Thank you for your rapid reply. Your assumption was correct and it works out of the box.

 

Just to follow-up on the model.

 

The following relationships exist (between Dates and Sprints) and (between Dates and WorkItems)

 

From date in Dates to attributes_startDate in Sprints (1:*) and (cross filter direction: Both)

From date in Dates to attributes_finishDate in Sprints (1:*) and (cross filter direction: Both)

From date in Dates to fields_SystemCreatedDate in WorkItems  (1:*) and (cross filter direction: Both)

 

Best regards

Martin

Anonymous's avatar
Anonymous
Not applicable
7 years ago

I want to warn you:

 

Be extremely careful with a model that has both-ways cross-filtering enabled. This is very DANGEROUS and you may end up calculating things you won't understand. The best people in the world of DAX say that both-ways cross-filtering should be enabled IF AND ONLY IF it's strictly necessary and when you understand all the consequences. I'd advise that you revise your model and remove cross-filtering as much as possible. If the model becomes at one point ambiguous (because, for instance, you add some tables to it and create relationships) and the engine does not detect it (which is not uncommon), then you'll be in deep trouble.

 

You've been warned.

 

Best

Darek

  • Anonymous's avatar
    Anonymous
    Not applicable
    7 years ago

    I see, thank you for the insights on this topic.

     

    I will change my model with this in mind.

     

    Best regards

    Martin

    • Thimios's avatar
      Thimios
      Helper III
      6 years ago

      Hi Anonymous,

      Could you pls advise for a similar issue?

      1st table is a typical Calendar table (column Date is of interest).

      2nd table has the following columns: Opportunity ID, Opp Start Date, Opp Close Date, Opp value.

      I want to get the cumulative value of valid Opportunities at 'Calendar'[Date] hierarchy. An Opportunity is considered valid when Date is between the Opp Start Date and the Opp Close Date.

      Thank you for your effort.

      • Anonymous's avatar
        Anonymous
        Not applicable
        6 years ago

         

        // Calendar can be connected via Date
// to any or both of the columns in Opportunities.
// This does not matter for this calculation.
// If there are any relationships, the
// CROSSFILTER function will remove the
// relationships. If there are no relationships
// you might need to remove the function from
// the code. Assumption is that each opportunity
// has a start date and a close date that's not
// blank. If an opportunity is still valid today
// the end date will be, say, coded as 3000-01-01.
// No blanks allowed. BLANKS will complicate the
// code and make it slower.

[Valid Opp Count] =
var __dateSelected = SELECTEDVALUE( Calendar[Date] )
var __isDateDirectlyFiltered = ISFILTERED( Calendar[Date] )
var __count =
	CALCULATE(
		Opportunities,
		Opportunities[Start Date] <= __dateSelected,
		__dateSelected <= Opportunities[End Date]
		
		// If you allow End Date to be blank, then you
		// have to add this to the above expression
		
		// || ISBLANK( Opportunities[End Date] )
		
		// Out of the two select the correct one
		// or remove them if there is no relationship
		// from Date to these columns.
		CROSSFILTER( 'Calendar'[Date], Opportunities[Start Date], NONE ),
		CROSSFILTER( 'Calendar'[Date], Opportunities[End Date], NONE )
	)
return
	if( __isDateDirectlyFiltered, __count )

         

         

        Best

        D