Need to sum the Values from one date to another date. the dates are stacked in column.

[AjayRangarajan]

Hi All , 

It would be grateful if any one can help me with a DAX formula(Measure) for summing the column from one date to another for each line item as the dates are all stacked as headers. i have added the screen shot , so what i need is to sum the ETC hours for the column from 2nd May to 13 june 20. Thanks in advance for your help.

[AllisonKennedy · Accepted solution]

Power BI is designed to work in columns, not rows.

So I recommend you click Transform Data from the Home tab and Unpivot the dates. To make this work for future data updates (as the date column headings change), I recommend you select all the NON date columns (in your screenshot this would mean you must select [Level], [ETC Hours], and any of the columns to the left that aren't in your screenshot).
Once you have selected these columns, click the Transform tab from within the Power Query Editor, then select Unpivot Other Columns. You will be left with ETC Hours, Level, Attribute and Value. Rename these if you wish.
Close & Apply your changes.
Then you can put the [Value] column (or whatever you renamed it to) in a visual in the Values and filter by date, level, etc.