Can we use Union in ABAP???

Question

Can we use Union in ABAP???
I have scenario like,
in an internal table i have entrie like this,
comp code     field1       field2       field3        field4       field5
0A1                   ABC        BCD          00             00              00
0A1                    00            00            CDE           00              00      
0A1                    00            00            00              EFG           IJK
but i need a single entry like this,
comp code     field1       field2       field3        field4       field5
0A1               ABC        BCD         CDE           EFG             IJK
how to do this????

Answer 1

You cannot use SELECT on internal tables so the question of UNION does not arise. Also, you cannot use UNION in ABAP. You need to code it to get the desired output
Move the first line of your internal table to a new int table i_ftab.
  DATA: num TYPE char1.
  num = 2.
  DO.
    READ TABLE i_tab -> initial internal table
      INTO wa_tab INDEX num.
    IF sy-subrc NE 0.
      EXIT.
    ENDIF.
    IF wa_tab-code NE '000'.
      MODIFY i_ftab INDEX 1 FROM wa_tab TRANSPORTING code.
    ELSEIF wa_tab-field1 NE '000'.
      MODIFY i_ftab INDEX 1 FROM wa_tab TRANSPORTING field1.
    ENDIF.
    num = num + 1.
  ENDDO.