Database Error:
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 orderwise' at line 3

Last Query:
select * from courses WHERE flag!="n" and category_id= ORDER BY orderwise

#0  Database->notify() called at [/home/onlinetr/public_html/lib/class.database.php:90]
#1  Database->query(select * from courses 
		               WHERE flag!="n" and category_id=
           		      ORDER BY orderwise) called at [/home/onlinetr/public_html/lib/class.database.php:230]
#2  Database->resulter(select * from courses 
		               WHERE flag!="n" and category_id=
           		      ORDER BY orderwise) called at [/home/onlinetr/public_html/lib/class.database.php:98]
#3  Database->numRows(select * from courses 
		               WHERE flag!="n" and category_id=
           		      ORDER BY orderwise) called at [/home/onlinetr/public_html/courses.php:40]