How to sum by rows these data ?

Thank you Luca. Actually it only partially solves my problem: it works fine as you suggested in a visual table but  I'd rather prefer to have it in a new column or new data table. 
I tried this after unpivoting (thanks a lot!) on a new column called "Sum by day":

Sum by day = SUMX(FILTER(Table, Table[Giorno]="31/07/2022"),[Valore])

Unfortunately it only calculates on the indicated day but assign the result for each day which is weird..my foult I know.. no idea how to make SUMX recursive on all different days.. 

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lucadelicio wrote:

Another faster way is to unpivot this table in the Power Query Editor.

 

And returns a table like this:
POD - Giorno - Quarter - Value

In this way you can sum faster all the value for a day with a measure like:

MEASURE = 
SUM(Table[value])

Put in a visual table type the day and the measure and you'll have the result.

 

Mark as a solution if resolve your problem.

 

Ciao

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