Query on internal table

Question

hello all,
i am confusing how affectively we can use the internal table key words. observe the following two sample codes, plz clarify what is the difference between these two.
1.
REPORT z_sample_report1 .
TYPES: t_spfli
       TYPE STANDARD TABLE OF spfli.
DATA: itab_flinfo TYPE t_spfli,
      wa_flinfo LIKE LINE OF
      itab_flinfo.
SELECT * FROM spfli INTO TABLE itab_flinfo.
  READ TABLE itab_flinfo INTO wa_flinfo
         WITH KEY carrid = 'LH'
                  connid = '2463'.
  IF sy-subrc = 0.
WRITE:/ wa_flinfo-carrid,
        wa_flinfo-connid,
        wa_flinfo-cityfrom,
        wa_flinfo-cityto,
        wa_flinfo-deptime,
        wa_flinfo-arrtime.
  ENDIF.
2.
REPORT z_sample_report1 .
DATA: BEGIN OF itab_flinfo OCCURS 6.
        INCLUDE STRUCTURE spfli.
DATA: END OF itab_flinfo.
DATA: wa_flinfo like line of itab_flinfo.
SELECT * FROM spfli INTO TABLE itab_flinfo.
  READ TABLE itab_flinfo INTO wa_flinfo
         WITH KEY carrid = 'LH'
                  connid = '2463'.
  IF sy-subrc = 0.
WRITE:/ wa_flinfo-carrid,
        wa_flinfo-connid,
        wa_flinfo-cityfrom,
        wa_flinfo-cityto,
        wa_flinfo-deptime,
        wa_flinfo-arrtime.
  ENDIF.

Answer 1

hi,
   both declarations are same
   The difference comes when you want to add one more field to your internal table
  Say you want to add one more field say CHECK(1) to your internal table , you cannot add this using the first method but you can do this using the second method
DATA: BEGIN OF itab_flinfo OCCURS 6.
INCLUDE STRUCTURE spfli.
data : CHECK(1).
DATA: END OF itab_flinfo.