Hello ABAPers 
I need help with an end routine where the indication/Flag value should be changed/replaced after we load the data through lookup.
Scenario: I have DSO1 where I have sales data and DSO2 (based on flat file) contains top customers marked with Flag field "x".
In DSO3, I consolidate data from DSO1-DSO3 (1:1, transformation) and DSO2 through lookup, mean DSO1 to DSO3 its transformation 1:1, and lookup to DSO2 where we have our top customers.
Requirements: When the flat file data is loaded for month e.g. "January" into DSO2, it should show Top customers in DSO3 after running the load into DSO3, but when we load next month e.g February data gets loaded then we need the new Top customer should be marked as "x" and the ones from January that might not be top customers anymore will change to empty field.
I hope I have explained well enough.
Thanks in advance!
Br,
ZD