conditions date expression

[refint_650]

Hi all 

how to implement this dax

if 

(A.Orderdate < @CalendarDate AND (A.purchasedate > @CalendarDate OR A.purchaseDate IS NULL))
OR (A.Orderdate > @CalendarDate) then count(id) else 0

vs

[selpaqm · Accepted solution]

@refint_650  please share a table content to explain yourself well. 

By the way you may use below schema for that kind of functions.

and = &&

OR =||

Column1= IF( ( (A.orderdate < @calendardate &&
               (a.purchasedate>@calendardate || 
                a.purchasedate <> BLANK()
                )
               )
                       || a.orderdate>@calenderdate
               ),
                                count(id), 0
            )