If previous day value is blank, then take lastnonblankvalue before current date

[LamSar]

Hello, 

I have a question. I'm creating a stock report. The end stock of the previous day, is the opening stock of the current day. However, on some days there is no end stock. 

This is an example of the table visual:

On 03/06/222 there are no stock calculations. 

So therefore the beginstock of 04/06/2022 is empty.  But I would like to see the endstock of 02/06/2022 (which is 20) as begin stock of 04/06/2022.

What I would like to achieve is the following:

If previous day value is blank, then take lastnonblankvalue before current date

This is the calculation of begin stock:

Begin stock =

VAR beginstock = CALCULATE(SUM(RetailStock[StockHoeveelheid]), PREVIOUSDAY('Datum'[Datum]))

Var Result = IF(

not(

ISBLANK(

SUM(RetailStock[StockHoeveelheid]))),

beginstock, blank())

Return

Result

How can I achieve this?

[onurbmiguel_]

Hello LamSar

Try this measure: 

Begin stock =

var _day = max('Datum'[Datum])

Var _daybefore = 
	calculate( 
		MAX(RetailStock[Datum]),
		Filter ( ALL(RetailStock),RetailStock[Datum]<_day)

VAR beginstock = 
	CALCULATE(
		SUM(RetailStock[StockHoeveelheid]), 
		Filter ( ALL(RetailStock),RetailStock[Datum]=_daybefore)

Var Result = 
IF(
not( ISBLANK(
SUM(RetailStock[StockHoeveelheid]))),
beginstock, blank())
Return
Result

Did I answer your question? Mark my post as a solution! Appreciate your Kudos!! ;-
Best Regards
BC

[LamSar]

Thank you for your answer. 

Sadly this will not work, because the RetailStock table does not hold a column with a date column. It only holds a column that holds a surrogate key (datatype int) that refers to the date dimension. 

I can't add a column because I'm using a tabular modal. 

[onurbmiguel_]

Hi again, 

So use the id 

Begin stock =

var _dayID = max('Datum'[DatumID])

Var _daybeforeID = 
	calculate( 
		MAX(RetailStock[DatumID]),
		Filter ( ALL(RetailStock),RetailStock[DatumID]<_dayID)

VAR beginstock = 
	CALCULATE(
		SUM(RetailStock[StockHoeveelheid]), 
		Filter ( ALL(RetailStock),RetailStock[DatumID]=_daybeforeID)

Var Result = 
IF(
not( ISBLANK(
SUM(RetailStock[StockHoeveelheid]))),
beginstock, blank())
Return
Result

Did I answer your question? Mark my post as a solution! Appreciate your Kudos!! ;-
Best Regards
BC

[LamSar]

I already tried that. But then I get the wrong values: