i have a HUGE table with account numbers. I am trying to find a certain sum, but I do not know which account no it is linked to. I need to sum totals in batches. Can anyone help? For example:

Account No Total
111222
111222
111222
123668
123668
123668
123668
569999
569999
569999
569999
569999
569999

I need to get the total of 111222 then 123668, etc... I have over 100000 records to go through. Can anyone help me?? THanks!!