select wr_id from g4_write_city_01 where ((INSTR(LOWER(wr_subject%7C%7Cwr_content), LOWER('%EC%86%8C%EC%95%A1%EB%8B%A8%EA%B8%B0%EB%8C%80%EC%B6%9C%EA%8F%A0'))) and (INSTR(LOWER(wr_subject%7C%7Cwr_content), LOWER('%E3%80%90%EC%BA%AC%ED%88%91F5555%E3%80%91%E3%80%90%EC%98%A4%EA%B3%B5%ED%8B%B0%EC%BC%93%E3%80%91'))) and (INSTR(LOWER(wr_subject%7C%7Cwr_content), LOWER('%EF%BC%87ice%E2%98%9E%EC%82%B0%EC%97%85%EC%B2%B4%EB%8C%80%EC%B6%9Clg%EC%86%8C%EC%95%A1%EA%B2%B0%EC%A0%9C%ED%95%9C%EB%8F%84%E3%84%B4conference'))) and (INSTR(LOWER(wr_subject%7C%7Cwr_content), LOWER('%EC%BB%AC%EC%B3%90%EB%9E%9C%EB%93%9C%ED%98%84%EA%B8%88%ED%99%94%EC%B2%AD%EC%A3%BC%EC%9D%BC%EC%88%98'))) and (INSTR(LOWER(wr_subject%7C%7Cwr_content), LOWER('sk%EC%86%8C%EC%95%A1%EA%B2%B0%EC%A0%9C%E2%85%B5%EB%B6%80%EC%B2%9C%EC%9D%BC%EC%88%98%E1%9B%8Cwore%DE%82'))))

1054 : Unknown column '7C' in 'where clause'

error file : /bbs/search.php