How to get value of the next row for a certain category?

[justlogmein]

I have been able to create a calculated column using the EARLIER function, however I am unsure on how to find the next row (or more than 1 row earlier for that matter).

The DAX below is what I have used to find the previous Sample Date for the same unit number. Can someone please tell me how I would find the next sample date and if there is a better way of writing my current formula? I feel like using MAX or SUM here is a little dodgy as I am not actually finding either, I just want to return a single value.

=
CALCULATE 
	(
	MAX
		(
		[Sample Date]
		),
	FILTER
		(
		'Sample Data',
		'Sample Data'[Sample Date] < EARLIER
			( 
			'Sample Data'[Sample Date]
			) 
		),
	'Sample Data'[Unit Number] = EARLIER
		(
		'Sample Data'[Unit Number]
		)
	)

[v-rongtiep-msft]

Hi @justlogmein ,

Please modify your formula.

Column =
CALCULATE (
    MIN ( 'Sample Date'[Sample Date] ),
    FILTER (
        'Sample Date',
        'Sample Date'[Sample Date] > EARLIER ( 'Sample Date'[Sample Date] )
            && 'Sample Date'[unit number] = EARLIER ( 'Sample Date'[unit number] )
    )
)

Or try to use @Jihwan_Kim 's way.

If I have misunderstood your meaning, please provide your pbix file without privacy information and desired output.

Best Regards

Community Support Team _ Polly

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

[Jihwan_Kim]

Hi,

Please try the below for creating a new column.

next sample date CC =
MINX (
    FILTER (
        'Sample Data',
        'Sample Data'[Sample Date] > EARLIER ( 'Sample Data'[Sample Date] )
            && 'Sample Data'[Unit Number] = EARLIER ( 'Sample Data'[Unit Number] )
    ),
    'Sample Data'[Sample Date]
)

[tamerj1]

Hi @justlogmein 

Please use

Top 1 Unit Number =
VAR CategoryTable =
    CALCULATETABLE (
        'Sample Data',
        ALLEXCEPT ( 'Sample Data', 'Sample Data'[Category] )
    )
VAR Top1Value =
    MAXX ( CategoryTable, 'Sample Data'[Sample Date] )
VAR Top1UnitNumber =
    MAXX (
        FILTER ( Top2Table, 'Sample Data'[Sample Date] = Top1Value ),
        'Sample Data'[Unit Number]
    )
RETURN
    Top1UnitNumber

2nd Top Unit Number =
VAR CategoryTable =
    CALCULATETABLE (
        'Sample Data',
        ALLEXCEPT ( 'Sample Data', 'Sample Data'[Category] )
    )
VAR Top2Table =
    TOPN ( 2, CategoryTable, 'Sample Data'[Sample Date] )
VAR Top2Value =
    MINX ( Top2Table, 'Sample Data'[Sample Date] )
VAR Top2UnitNumber =
    MAXX (
        FILTER ( Top2Table, 'Sample Data'[Sample Date] = Top2Value ),
        'Sample Data'[Unit Number]
    )
RETURN
    Top2UnitNumber

[AlB · Accepted solution]

Or if you want  more generic solution, , where you can specify the poisition you want by changing N_  (4th last in the example):

A =
VAR N_ = 4 // 1 is the immediately previous, 2 is the one before and so forth 
VAR auxT_ =
    TOPN (
        N_,
        CALCULATETABLE (
            DISTINCT ( 'Sample Data'[Sample Date] ),
            'Sample Data'[Sample Date] < EARLIER ( 'Sample Data'[Sample Date] ),
            ALLEXCEPT ( 'Sample Data', 'Sample Data'[Unit Number] )
        ),
        'Sample Data'[Sample Date], DESC
    )
RETURN
    MINX ( auxT, 'Sample Data'[Sample Date] )

Please accept the solution when done and consider giving a thumbs up if posts are helpful.  Contact me privately for support with any larger-scale BI needs, tutoring, etc.

[AlB]

Hi @justlogmein 

NewCol = 
VAR previousDate_ =
    CALCULATE (
        MAX ( [Sample Date] ),
        'Sample Data'[Sample Date] < EARLIER ( 'Sample Data'[Sample Date] ),
        ALLEXCEPT ( 'Sample Data', 'Sample Data'[Unit Number] )
    )
RETURN
    CALCULATE (
        MAX ( [Sample Date] ),
        'Sample Data'[Sample Date] < previousDate_,
        ALLEXCEPT ( 'Sample Data', 'Sample Data'[Unit Number] )
    )

Please accept the solution when done and consider giving a thumbs up if posts are helpful.  Contact me privately for support with any larger-scale BI needs, tutoring, etc.