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Frequent Visitor

## Difference between two points

Hi Guys,

I have data that is not transactional. Each entry is the current value for that month. Thus it's not data such as sales that can be summed but rather a single value at a point in time.

My objective is to determine the difference between the value for this month and six months prior. All the examples use a variation of this Datesbetween formula:

Delta =
CALCULATE(sum(Sales[Monthly Sales]),
DATESBETWEEN('Calendar'[Date],
Max('Calendar'[Date]) - 180,
Max('Calendar'[Date])))

This doesn't work as I don't 'Sum' my data. See the image below:

I just want to do simple math and determine 2000 (From this month) - 2500 (From 6 months ago) = -500. Can't get it right at all!

Thanks

6 REPLIES 6
Frequent Visitor

## Re: Difference between two points

You could try something like

CALCULATE(

SUM(

Sales[Monthly Sales]

)

)

-

CALCULATE(

SUM(

Sales[Monthly Sales]),

FILTER(

ALL('Calendar'),

'Calendar'[Date]=Max('Calendar'[Date]) - 180

)

)

BR

Frequent Visitor

## Re: Difference between two points

It's still returning the whole table. I want a scalar value returned. Surely there should be a simple way to do calculations like this in PowerBI

Community Support Team

## Re: Difference between two points

Hi @JBI ,

For your requirement, you could refer to the measure below. You could modify it based on your scenario.

```Measure =
VAR c_m =
CALCULATE (
SUM ( 'Sales'[Project Sales] ),
FILTER (
'Calendar',
'Calendar'[Month] = MAX ( 'Sales'[Month] )
&& 'Calendar'[Date].[Year] = MAX ( 'Sales'[year] )
)
)
VAR c_m_6 =
CALCULATE (
SUM ( 'Sales'[Project Sales] ),
DATEADD ( 'Sales'[Date_column], -6, MONTH )
)
RETURN
c_m - c_m_6
```

Here is the output.

For more details, please refer to my attchment.

Best  Regards,

Cherry

Community Support Team _ Cherry Gao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Community Support Team

## Re: Difference between two points

Hi @JBI ,

If you have solved, please  always accept the replies making sense as solution to your question so that people who may have the same question can get the solution directly.

Best Regards,

Cherry

Community Support Team _ Cherry Gao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Frequent Visitor

## Re: Difference between two points

Hi,

Did not get solution no. I got a solution on a different feed.

Thanks

Community Support Team

## Re: Difference between two points

Hi @JBI ,

If you get a solution, could you share and accept the replies making sense as solution to your question so that people who may have the same question can get the solution directly.

Best Regards,

Cherry

Community Support Team _ Cherry Gao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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