SQL行状态更改之间的时间间隔

我有一个sqlite3表格，它每30秒记录一次我的加热系统和炉子的状态。这张桌子看起来像这样

TABLE CLIMATESYSTEM (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    Timestamp INT,
    FAN INT,
    SYSTEM INT
);

5577|1452049280|1|1
5578|1452049339|1|1
5579|1452049399|1|1
5580|1452049459|1|1
5581|1452049520|0|0
5582|1452049580|0|0
5583|1452049644|1|1
5584|1452049700|1|1
5585|1452049760|1|1
5586|1452049820|0|0

timestamp是自python中的epoch（（int）time.time）起的秒数

桌子上有几行是这样的

TABLE CLIMATESYSTEM (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    Timestamp INT,
    FAN INT,
    SYSTEM INT
);

5577|1452049280|1|1
5578|1452049339|1|1
5579|1452049399|1|1
5580|1452049459|1|1
5581|1452049520|0|0
5582|1452049580|0|0
5583|1452049644|1|1
5584|1452049700|1|1
5585|1452049760|1|1
5586|1452049820|0|0

我试图做的是计算从开启（1）到关闭（0）的状态转换与从关闭到开启的下一次转换之间的时间秒数

示例计算#5577和#5581之间的秒数->添加到时间系统打开

示例计算#5581和#5583->添加到时间系统关闭之间的秒数

我打算做的是测量我的供暖系统在24小时内运行的总时间

关于起点有什么想法吗

---

谢谢

首先，查找每行的下一个时间戳：

SELECT Timestamp,
       (SELECT MIN(Timestamp)
        FROM ClimateSystem AS CS2
        WHERE CS2.Timestamp > ClimateSystem.Timestamp
       ) AS NextTimestamp,
       System
FROM ClimateSystem;

然后使用该值计算每个间隔的长度：

SELECT NextTimestamp - Timestamp,
       System
FROM (SELECT Timestamp,
             (SELECT MIN(Timestamp)
              FROM ClimateSystem AS CS2
              WHERE CS2.Timestamp > ClimateSystem.Timestamp
             ) AS NextTimestamp,
             System
      FROM ClimateSystem);

然后根据需要添加过滤器：

SELECT SUM(NextTimestamp - Timestamp),
       System
FROM (SELECT Timestamp,
             (SELECT MIN(Timestamp)
              FROM ClimateSystem AS CS2
              WHERE CS2.Timestamp > ClimateSystem.Timestamp
             ) AS NextTimestamp,
             System
      FROM ClimateSystem)
WHERE Timestamp BETWEEN :StartOfDay AND :EndOfDay
GROUP BY System;

---

请澄清第三列，

风机

与问题的关系。风机列显示风机是否在运行（因为风机在熔炉关闭后运行）。对于这个问题，没有考虑。