Question

我希望使用此示例数据 OPEN 列出开始时间和结束时间

以下是表格中的一些示例数据

currenttime,       door_status, 
12-10-15 12:02:00    Open
12-10-15 12:01:00    Open
12-10-15 12:00:30    Open
12-10-15 11:59:30    Open
12-10-15 11:59:00    Open
12-10-15 11:58:30    Open
12-10-15 11:58:00    Closed
12-10-15 11:57:30    Closed
12-10-15 11:57:00    Open
12-10-15 11:56:00    Open
12-10-15 11:55:30    Open
12-10-15 11:55:00    Open

这是预期的结果

start_Time             end_Time               time_it_was_open

12-10-15 11:58:30      12-10-15 12:02:00       3 mins 30 secs
12-10-15 11:55:00      12-10-15 11:57:00       2 mins

尝试查询

查询1：

SELECT current_time_open, current_time_closed, door1  FROM(
SELECT 
    CASE
        WHEN door1 = 'Open' THEN currenttime
    END AS current_time_open,
   CASE
        WHEN door1 = 'Closed' THEN currenttime
    END AS current_time_closed,
   door1
FROM
    (SELECT 
        r1.currenttime, r1.temp, r1.door1
    FROM
        rcs_data r1 ) as g1 GROUP BY currenttime DESC) as t1;

查询2：

SELECT MAX(current_time_open), MAX(current_time_closed), TIMEDIFF(MAX(current_time_open),MAX(current_time_closed)) FROM (SELECT 
    CASE
        WHEN door1 = 'Open' THEN currenttime
    END AS current_time_open,
   CASE
        WHEN door1 = 'Closed' THEN currenttime
    END AS current_time_closed
FROM
    (SELECT 
        currenttime, temp, door1
    FROM
        rcs_data) as g1 GROUP BY currenttime DESC) as t1;

Answer 1

这是执行此操作的一种变体：

select *, unix_timestamp(endtime)-unix_timestamp(starttime) as dur_seconds
from (
select min(currenttime) as starttime, max(currenttime) as endtime
from (
select currenttime, coalesce(
 (select min(currenttime) from t as b where b.currenttime > a.currenttime and b.door_status != a.door_status),
 (select max(currenttime) from t as b where b.currenttime > a.currenttime and b.door_status = a.door_status),
 a.currenttime) as mxt
from t as a
where a.door_status = 'Open'
) as q
group by mxt
) as q2

所以，主要的想法是＆＃34;分配＆＃34;一些独特的ID对于＆＃34; open＆＃34;状态，在这种特殊情况下，它是关闭状态的第一次或打开状态的最后一次，或者是最后一次打开状态的当前时间。表中的状态

如何获取每个状态的开始时间和结束时间

1 个答案: