Hep pls how to read the data from another table for each month

[Oscar_Rossini]

I have two tables that are not referenced
table [customers], with virtual columns, [SUMbooking], [SUMtotal], [month]
several rows have the same value for the same month
table [totals], with columns of the same name
I need that [totals] table to take the values from the [customers] table for each month