Create a new table with aggregate value

[Laurent_PULCE]

Hello,

I start with AppSheet and I need help on this topic.

I will (extremly) simplify my case : I have a table with detailed data which structure is :

-[Date Time Issue] - DateTime - Key

-[Value] - Decimal 

-[TheDay] - Date - Date([Date Time Issue])

I want to get an additional table containing the SUM of [Value] per [TheDay] (To perform others kinds of reports etc..)

How can I achieve that ?

Thanks a lot for the help