EX

PARAMETERS: p_cityfr TYPE spfli-cityfrom,
            p_cityto TYPE spfli-cityto.

DATA: BEGIN OF wa,
         fldate TYPE sflight-fldate,
         carrname TYPE scarr-carrname,
         connid   TYPE spfli-connid,
       END OF wa.

DATA itab LIKE SORTED TABLE OF wa
               WITH UNIQUE KEY fldate carrname connid.  // 여기까진 이해
//

SELECT c~carrname p~connid f~fldate
       INTO CORRESPONDING FIELDS OF TABLE itab
       FROM ( ( scarr AS c
         INNER JOIN spfli AS p ON p~carrid   = c~carrid
                              AND p~cityfrom = p_cityfr
                              AND p~cityto   = p_cityto )
         INNER JOIN sflight AS f ON f~carrid = p~carrid
                                AND f~connid = p~connid ).

//  이부분을 도통 이해 못하겠습니다.  알기 쉽게 나온 예제나 결과물도 없구요. ㅜㅜ
     'c' ,'p','f','~' 이런 구문도 이해 못하겠습니다.            

LOOP AT itab INTO wa.
  WRITE: / wa-fldate, wa-carrname, wa-connid.
ENDLOOP.

* 급 초보보다 보니  개념잡는문제에서 많이 막혀 버리네요 ㅠㅠ
   답글 부탁 드릴께요..

// 답글달수 있는 그날까지 화이링! .//