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제목에 띄어 쓰기가 된 검색어를 검색해서 검색된 게시물을 클릭하니까

아래와 같은 에러메시지가 나오는데요... 왜그럴까요?



select wr_id, wr_subject from g4_write_movie_4 where wr_comment > -1 and wr_num = '-3' and wr_reply < '' and ( ( INSTR(wr_subject, '내') > 0 ) ( INSTR(wr_subject, '머리속의') > 0 ) ( INSTR(wr_subject, '지우개') > 0 ) ) order by wr_num desc, wr_reply desc limit 1

1064 : You have an error in your SQL syntax near '( INSTR(wr_subject, '머리속의') > 0 ) ( INSTR(wr_subject, '지우개') > ' at line 1

error file : /bbs/board.php