Converting Tableau function into Power BI DAX

[Anonymous]

IF LOOKUP(MIN([ID]),0) = LOOKUP(MIN([ID]),-1)

THEN DATEDIFF('day',LOOKUP(MIN([Date]), -1), LOOKUP(MIN([Date]), 0))

END

Need to convert this Tableau function into DAX, I have attaced sample data for your reference. 

[v-henryk-mstf · Accepted solution]

Hi @Anonymous ，

According to your description, refer to the following formula whether to meet your going:

col_new =
VAR _max =
    CALCULATE (
        MAX ( 'Table'[Date] ),
        FILTER (
            ALL ( 'Table' ),
            'Table'[ID] = EARLIER ( 'Table'[ID] )
                && 'Table'[Date] < EARLIER ( 'Table'[Date] )
        )
    )
RETURN
    DATEDIFF ( _max, 'Table'[Date], DAY )

If the problem is still not resolved, please point it out. Looking forward to your reply.

Best Regards,
Henry

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

[amitchandak]

@Anonymous , a new column

var _max = maxx(filter(Table, [ID] = earlier([ID]) && [Date] < earlier([Date]) ), [Date])

return

datediff(_max, [Date], day)