is it possible to update values in aftersubmit? i have to do a comparison and flag is true update the values.. BUT, in aftersubmit we are already submitting the values to database first and then performing the comparision logic.. how does it make sense ? how will my value be updated when data is already submitted to database? my senior told me its better to use aftersubmit than beforesubmit?

You will need to load the record, make updates, and save it.

got it