SELECT
			c.*,
			m.user_name
		FROM
			asm_s_members m, 
			asm_comment_messages c
		WHERE
			c.member_id = m.member_id
			AND topic_id = '2'
			AND c.approved = 1 AND c.private = 0
		ORDER BY
			post_date ASC LIMIT 100

Error: Unknown column 'c.approved' in 'where clause'