SELECT `l2jdb_drop`.`id_npc` , `l2jdb_drop`.`category` ,
		SUM( LEAST( `l2jdb_drop`.`chance` *6, 1000000 ) ) AS `chance_sum`
	FROM `l2jdb_drop`
	WHERE (
		`id_npc` , `category`
		)
		IN (
			SELECT `id_npc` , `category`
			FROM `l2jdb_drop`
			WHERE id_item =1868
			)
	GROUP BY `id_npc` , `category`