Dax measure to get previous 7days and next 7days of selected date

[prv_1401]

Hey guys !

 I am very new to PowerBI. Could you suggest me the Dax functions or the syntax with any examples to solve this issue .

I have to show a line chart visual which shows the previous 7days value and after 7days value of a selected date . So if I select a particular date the measure should filter the visual according to it and show according to the requirement .

Appreciate any help. Thank you ♥️

[PaulOlding · Accepted solution]

Hi @prv_1401 

This solution uses a disconnected date table called 'Date Selector' (meaning it's a date table without any relationship to another table).  The slicer should use this table.

7and7 = 
VAR _SelectedDate = SELECTEDVALUE('Date Selector'[Date])
VAR _Dates = DATESBETWEEN('Date'[Date], _SelectedDate - 7, _SelectedDate + 7)
VAR _Result =
CALCULATE(
    [Total Sales],
    KEEPFILTERS(_Dates)
    )
RETURN
    _Result

The line chart uses the Date column from the Date table.

[prv_1401]

Hi ..Thank you for replying 
what if the sales value in the table is percentage % ??
So for instance sales % for eachdate is given. You have mentioned there in dax [total sales] Is that a measure you created? .
In case of % how should I deal with it ?
@PaulOlding 

[PaulOlding]

@prv_1401 

Yes, [Total Sales] is a measure.  You can replace it with any measure and the pattern should work, so one that returns a %age will be fine.

[daXtreme]

If you're very new to Power BI, I would then kindly suggest you should learn a bit about the philosophy of PBI because what you want to do is not the easiest thing under the sun. Here's an example of what you'd need to , more or less, implement: Show last 6 months based on user single slicer selection (youtube.com)