select a.*, b.bo_subject, c.gr_subject, c.gr_id from g5_board_new a, g5_board b, g5_group c where a.bo_table = b.bo_table and b.gr_id = c.gr_id and b.bo_use_search = 1 and a.wr_id = a.wr_parent order by a.bn_id desc limit -20, 20

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 '-20, 20' at line 1

error file : /index.php