<p class="warning">Error. Database query failed. <br>
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 b.classid = a.parentid' at line 6<br>
SELECT b.classid as parentheading, b.name AS description,
		  b.class_level as parentlevel,
		  a.class_level as childlevel, a.name as childdescription
			FROM clsmain a, clsmain b
			WHERE a.classid = 
			AND b.classid = a.parentid</p>
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