IF i_initflag = 'X'.
  CLEAR: ra_aedat[], ra_aedat.
    LOOP AT i_t_select WHERE fieldnm = 'AEDAT'.
      MOVE-CORRESPONDING i_t_select TO ra_aedat.
      APPEND ra_aedat.
    ENDLOOP. 
SELECT * INTO CORRESPONDING FIELDS OF TABLE it_zsco_cmr_customer
      FROM ztjaddr AS z
        INNER JOIN kna1 AS k
          ON z~kunnr = k~kunnr
        INNER JOIN adrc AS a
          ON a~addrnumber  = z~adrnum
        WHERE z~aedat IN ra_aedat.
    EXIT.
  ENDIF.
*
  IF s_extract = 'X'.
    CLEAR: s_extract.
    RAISE no_more_data.
*    EXIT.
  ENDIF.
*
  CLEAR: e_t_data[].
*
  DO i_maxsize TIMES.
    s_num_rows = s_num_rows + 1.
    IF s_num_rows > LINES( it_zsco_cmr_customer[] ).
      s_extract = 'X'.
      EXIT.
    ENDIF.
    READ TABLE it_zsco_cmr_customer INDEX s_num_rows.
    APPEND it_zsco_cmr_customer TO e_t_data.
  ENDDO.

Loop from to

append lines of i_tab from ... to ...