검색폼에서 오류내용좀 알려주세요

검색어를 넣고 검색하다가 이런 경우가 나오면, 어느부분이 잘못된거에요?

오류내용

select distinct wr_parent from g4_write_test7 where stx = '진행' and ((INSTR(, '진행')) ) and (wr_num between '-17' and '9983')

1064 : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' '진행')) ) and (wr_num between '-17' and '9983')' at line 1

error file : /bbs/board.php