Join and aggregating two internal tables into one - abap

Question

I need to aggregate the below two tables into one, per True_Origin and True_Destination level.
Table 2 (IT_DATES_OD):
FDate2 Flight_Number2 Origin2 Destination2 Amount3 Amount4
20190501 123 DXB LOS 5 12
20190501 123 DXB LOS 22 558
20190501 123 DXB LOS 2556 4585
Table 1 (IT_TOD_OD):
Flight_Date_OD Flight_Number_OD Origin Destination True_origin True_destination Net_Net_Net Amount2
20190501 123 DXB LOS DXB NBO 5 12
20190501 123 DXB LOS DXB ADD 22 558
20190501 123 DXB LOS DXB LOL 2556 4585
I can aggregate using common fields (Date, Flight Number, Origin, Destination) but I can't aggregate on a detailed level on True_origin and True_destination.
SORT IT_DATES_TOD BY FDATE2 FLIGHT_NUMBER2 ORIGIN2 DESTINATION2 ASCENDING.
CLEAR WA_OUTPUT.
LOOP AT IT_DATES_TOD INTO WA_DATES_TOD WHERE FDATE2 <> ''.
WA_OUTPUT-FDATE = WA_DATES_TOD-FDATE2.
WA_OUTPUT-FLIGHT_NUMBER = WA_DATES_TOD-FLIGHT_NUMBER2.
WA_OUTPUT-ORIGIN = WA_DATES_TOD-ORIGIN2.
WA_OUTPUT-DESTINATION = WA_DATES_TOD-DESTINATION2.
LOOP AT IT_TOD_OD INTO WA_TOD_OD
WHERE FLIGHT_DATE_OD = WA_DATES_TOD-FDATE2
AND FLIGHT_NUMBER_OD = WA_DATES_TOD-FLIGHT_NUMBER2
AND ORIGIN = WA_DATES_TOD-ORIGIN2
AND DESTINATION = WA_DATES_TOD-DESTINATION2.
WA_OUTPUT-TRUE_ORIGIN = WA_TOD_OD-TRUE_ORIGIN.
WA_OUTPUT-TRUE_DESTINATION = WA_TOD_OD-TRUE_DESTINATION.
WA_OUTPUT-NET_NET_NET = WA_TOD_OD-NET_NET_NET.
WA_OUTPUT-RE_PRO_REVFUEL = 0.
WA_OUTPUT-BLOCK_HOUR = 0.
APPEND WA_OUTPUT TO IT_OUTPUT.
ENDLOOP.
ENDLOOP.

Answer 1

Please have a look at the collect Syntax in ABAP:
COLLECT statement in ABAP is used for inserting the components of a work area into an internal table by avoiding duplicate entries and also in a summarized way.
Syntax
COLLECT <line> INTO <itab>
When you use collect statement the following steps are occurring.
First it will check in internal table for any record matching with the key in work area data.
If it couldn’t find any matching record, then the new data from work area will be inserted in internal table
If any record found with the same key, then instead of inserting a new record, it will add the numeric field values of work area components with the corresponding field components in the matched record and update the internal table record.
both of your itabs should use the Destination structure:
Date F_Number Orign Destin T_origin T_destin Amount Amount2
so the collect command can make use add functionality of the numeric fields.