SELECT b.itemFk,
		b.quantity,
		b.buyingValue,
		b.stickers,
		b.packing,
		i.name,
		IFNULL(i2.comment, i.comment) comment,
		i.tag5,
		i.value5,
		i.tag6,
		i.value6,
		i.tag7,
		i.value7
	FROM buy b
		JOIN item i ON i.id = b.itemFk
		LEFT JOIN item i2 ON i2.id = b.itemOriginalFk
	WHERE b.entryFk = ?