select distinct wr_parent from g4_write_B31 where ((INSTR(LOWER(wr_subject7C7Cwr_content), LOWER('%C1%D8%BA%F1%BC%AD%B7%F9'))) ) and (wr_num between '-1' and '9999')

1054 : Unknown column 'wr_subject7C7Cwr_content' in 'where clause'

error file : /bbs/board.php