REPORT z03_09.

SELECT SINGLE @abap_true
       FROM zemplist
       WHERE ename = '김철수'
       INTO @DATA(gv_exist).

IF gv_exist = abap_true.
  cl_demo_output=>display( |데이터가 존재합니다.| ).
ELSE.
  cl_demo_output=>display( |데이터가 존재하지 않습니다.| ).
ENDIF.