How to populate an internal table from three different tables

Question

My requirement is to populate an itab by retrieving data from three diff db tables,
ekko,ekpo and Ekbe.
below is the code for data retrieval .
SELECT EBELN INTO TABLE IT_EKKO FROM EKKO WHERE EBELN IN S_EBELN.
  IF NOT IT_EKKO[] IS INITIAL.
    SELECT  EBELP TXZ01 NETWR BUKRS INTO CORRESPONDING FIELDS OF TABLE IT_EKPO FROM EKPO FOR ALL ENTRIES IN IT_EKKO
      WHERE EBELN EQ IT_EKKO-EBELN.
IF NOT IT_EKPO[] IS INITIAL.
      SELECT  EMATN WAERS WERKS GJAHR BEWTP INTO CORRESPONDING FIELDS OF TABLE IT_EKBE FROM EKBE FOR ALL ENTRIES IN IT_EKPO
        WHERE EBELN EQ IT_EKPO-EBELN
         AND  EBELP EQ IT_EKPO-EBELP
         AND  BEWTP EQ 'E' OR BEWTP EQ 'Q'.
        ENDIF.
        ENDIF.
please tell me how to populate data from it_ekko,it_ekpo and it_ekbe into an internal table ITAB.

Answer 1

Hi Mayana,
You take one final structure & final internal table, & within that structure take all the fields which is required to be displayed as a final output.
for data fetching from different table, you take three different structures & three internal table for that, because into corresponding fields of table is not good for performance wise. Use into table syntax.
follow the below example:(similarly)
sort it_klah by key fields.
LOOP AT IT_KSSK INTO WA_KSSK.
    READ TABLE IT_KLAH INTO WA_KLAH WITH KEY CLINT = WA_KSSK-CLINT
                                             KLART = WA_KSSK-KLART.
    IF SY-SUBRC EQ 0.
      MOVE:  WA_KLAH-OBJEK to WA_final-OBJEK.
Read another table........(2nd one)
IF SY-SUBRC EQ 0.
      MOVE:  ....................................
      APPEND WA_final TO IT_final.
    ENDIF.
clear wa_final.
  ENDLOOP.
finally display it_final records.
Hope this can solve your problems.
Regards,
Tutun