SELECT ca_name, wr_name, wr_1, wr_10, wr_subject, sum( wr_2 ) AS pt FROM g4_write_rank_month WHERE ='' && wr_9='' GROUP BY ca_name, wr_name ORDER BY pt DESC

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 '='' && wr_9='' GROUP BY ca_name, wr_name ORDER BY pt DESC' at line 2

error file : /bbs/rank_update.php