Unknown column 'costs' in 'where clause'Unknown column 'costs' in 'where clause'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 'ORDER BY id DESC LIMIT 0,2' at line 1You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ORDER BY id DESC LIMIT 0,2' at line 1