select wm_board.wm_title, fi.wm_filename from sp_wm_edu.php as wm_board left join sp_board_file as fi ON (wm_board.wm_id = fi.wm_bid) where fi.wm_num = 0 AND fi.wm_table='edu.php' and wm_board.wm_id =20

0 :

error file : /_subpage/kor/board/edu.php