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## Calculating difference of values per different rows in same table in Power BI

Hello,

I am trying to calculate difference between values but getting wron answer.

Here is my data table as example.

I have tried to use this formula:

Difference =
VAR _0 = MAXX(FILTER('x','x'[date]<EARLIER('x'[date]) && 'x'[ID]<EARLIER('x'[ID])),[date])
VAR _1 = MAXX(FILTER('x','x'[date] =_1 && 'x'[ID]<EARLIER('x'[ID]) ),[cre])
return
if('x'[deb] <> 0,_1 - 'x'[deb], blank())

My expected result is:

But I am getting wrong result as:

Seems that 0.87!=-3289.13.

So what's wrong with my query?

1 ACCEPTED SOLUTION
Community Support

Try this code.

``````Difference =
VAR _MaxDate =
MAXX (
FILTER (
'x',
'x'[date] > EARLIER ( 'x'[date] )
&& 'x'[ID] = EARLIER ( 'x'[ID] )
),
[date]
)
VAR _CRE =
SUMX (
FILTER ( ALL ( 'x' ), 'x'[date] = _MaxDate && 'x'[ID] = EARLIER ( 'x'[ID] ) ),
[CRE]
)
RETURN
IF ( x[DET] <> 0, _CRE - x[DET], BLANK () )``````

Result is as below.

Best Regards,
Rico Zhou

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

2 REPLIES 2
Community Support

Try this code.

``````Difference =
VAR _MaxDate =
MAXX (
FILTER (
'x',
'x'[date] > EARLIER ( 'x'[date] )
&& 'x'[ID] = EARLIER ( 'x'[ID] )
),
[date]
)
VAR _CRE =
SUMX (
FILTER ( ALL ( 'x' ), 'x'[date] = _MaxDate && 'x'[ID] = EARLIER ( 'x'[ID] ) ),
[CRE]
)
RETURN
IF ( x[DET] <> 0, _CRE - x[DET], BLANK () )``````

Result is as below.

Best Regards,
Rico Zhou

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

Super User

@Analitika , small change

Column =
VAR _0 = MAXX(FILTER('x','x'[date]<EARLIER('x'[date]) && 'x'[ID]= EARLIER('x'[ID])),[date])
VAR _1 = MAXX(FILTER('x','x'[date] =_1 && 'x'[ID]= EARLIER('x'[ID]) ),[cre])
return
if('x'[deb] <> 0,_1 - 'x'[deb], blank())

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