@Override
	public int compareTo(DBUpdateTimestamp o) {
		int t = this.year - o.year;
		int u = this.month - o.month;
		int v = this.day - o.day;
		int w = this.count - o.count;
		if (t != 0)
			return t;
		if (u != 0)
			return u;
		if (v != 0)
			return v;
		if (w != 0)
			return w;
		return 0;
	}