प्राविधिक समस्या उत्पन्न भएकोमा माफी चाहन्छौ

Error Number: 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 'AND sections = 'graphics' ORDER BY sn desc LIMIT 25' at line 4

SELECT * FROM tbl_headlines WHERE sn != AND sections = 'graphics' ORDER BY sn desc LIMIT 25