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Anonymous
Not applicable

## calculate difference between date vs date -1 & sum the difference

Sorry I'm new to PowerBI and after few hours trying still could not figure out a right way to deal with this:

I got data like this:

Should CALCULATE(SUM())-CALCULATE(SUM()) be used?
 Date Some numbers Set Date vs Date -1 Difference Mar 1 100 A n/a Mar 1 200 B n/a Mar 2 110 A use Mar 2(110)-use Mar 1(100) = 10 Mar 2 190 B use Mar 2(190)-use Mar 1(200) = -10 Mar 3 120 A use Mar 3(120)-use Mar 2(110) = 10 Mar 3 200 B use Mar 3(200)-use Mar 2(190) = 10

I want to do two things:
1) calculate the difference between Date vs. Date -1
2) Sum up different of a Set, A = 10+10 = 20, B = -10+10 = 0

 A 20 B 0

And I will keep adding more data of set A & B in coming days.

Hope it's clear enough and I can learn new tricks from you! Thanks in advance!

1 ACCEPTED SOLUTION
Community Support

Hi @Anonymous ,

>>1) calculate the difference between Date vs. Date -1

Please refer to the dax code for calculated column below:

``````DIFF =

IF (

DATEADD ( 'Table'[Date], -1, DAY ) IN VALUES ( 'Table'[Date] ),

VAR C = 'Table'[Some numbers]

VAR Y =

CALCULATE (

SUM ( 'Table'[Some numbers] ),

FILTER (

'Table',

'Table'[Date]

= EARLIER ( 'Table'[Date] ) - 1

&& 'Table'[Set] = EARLIER ( 'Table'[Set] )

)

)

RETURN

C - Y,

BLANK ()

)``````

>>2) Sum up different of a Set, A = 10+10 = 20, B = -10+10 = 0

You can create a measure to compute total of different:

``Measure = SUM('Table'[DIFF])``

For more details ,please refer to the pbix file : https://qiuyunus-my.sharepoint.com/:u:/g/personal/pbipro_qiuyunus_onmicrosoft_com/ESNDZuuwR_BAmuiwUDZArmcBY6-bho5CUD6OOrDbHivc3Q?e=FWPGIC

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

Best Regards,

Dedmon Dai

4 REPLIES 4
Community Support

Hi @Anonymous ,

>>1) calculate the difference between Date vs. Date -1

Please refer to the dax code for calculated column below:

``````DIFF =

IF (

DATEADD ( 'Table'[Date], -1, DAY ) IN VALUES ( 'Table'[Date] ),

VAR C = 'Table'[Some numbers]

VAR Y =

CALCULATE (

SUM ( 'Table'[Some numbers] ),

FILTER (

'Table',

'Table'[Date]

= EARLIER ( 'Table'[Date] ) - 1

&& 'Table'[Set] = EARLIER ( 'Table'[Set] )

)

)

RETURN

C - Y,

BLANK ()

)``````

>>2) Sum up different of a Set, A = 10+10 = 20, B = -10+10 = 0

You can create a measure to compute total of different:

``Measure = SUM('Table'[DIFF])``

For more details ,please refer to the pbix file : https://qiuyunus-my.sharepoint.com/:u:/g/personal/pbipro_qiuyunus_onmicrosoft_com/ESNDZuuwR_BAmuiwUDZArmcBY6-bho5CUD6OOrDbHivc3Q?e=FWPGIC

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

Best Regards,

Dedmon Dai

Anonymous
Not applicable

WORK LIKE A CHARM!
The sample file do help me understand the overall calcuation. Thanks a lot for spending time to create that tutorial!!

Super User

@Anonymous , You can create a new column like

``diff = maxx(filter(table,table[set]=earlier(table[set])	 && table[Date]=earlier(table[Date])-1),table[Some numbers]) -table[Some numbers]``
Super User

Well, the first part should be something like:

``````Column =
Var __Today = [Some numbers]
VAR __Yesterday =
SUMX(
FILTER(
'Table',
[Date]=(EARLIER([Date])-1)*1. &&
[Set] = EARLIER([Set])
)
,[Some numbers])
RETURN
__Today - __Yesterday``````

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