Mysql me | TimeOn | TimeOff | x :---------- | :------- | :---------- | :------- | :------- | :------- 猴面包树|迪拉| 07:55:52 | 08:58:45 | 10:50:42 | 10:50:42 猴面包树|迪拉| 07:55:52 | 10:50:42 | 10:59:58 | 10:59:58 猴面包树|迪拉| 07:55:52 | 10:51:13 |空| 10:59:58 猴面包树|迪拉| 07:55:52 | 10:56:36 |空| 10:59:58 猴面包树|迪拉| 07:55:52 | 10:59:58 | 12:04:04 | 12:04:04 猴面包树|迪拉| 07:55:52 | 11:20:45 |空| 12:04:04 猴面包树|迪拉| 07:55:52 | 12:04:04 |空|空 制定电子计划|银行| 16:23:47 | 16:23:53 | 17:33:24 | 17:33:24 Make-e-plan | BANK | 16:23:47 | 17:33:24 | null | null 制作电子计划|银行| 16:23:47 | 18:50:07 |空|空
D小提琴（mariadb_10.2） 顺便说一下，我没有让你的查询“按原样”工作，所以我无法比较结果 ----Mysql me | TimeOn | TimeOff | x :---------- | :------- | :---------- | :------- | :------- | :------- 猴面包树|迪拉| 07:55:52 | 08:58:45 | 10:50:42 | 10:50:42 猴面包树|迪拉| 07:55:52 | 10:50:42 | 10:59:58 | 10:59:58 猴面包树|迪拉| 07:55:52 | 10:51:13 |空| 10:59:58 猴面包树|迪拉| 07:55:52 | 10:56:36 |空| 10:59:58 猴面包树|迪拉| 07:55:52 | 10:59:58 | 12:04:04 | 12:04:04 猴面包树|迪拉| 07:55:52 | 11:20:45 |空| 12:04:04 猴面包树|迪拉| 07:55:52 | 12:04:04 |空|空 制定电子计划|银行| 16:23:47 | 16:23:53 | 17:33:24 | 17:33:24 Make-e-plan | BANK | 16:23:47 | 17:33:24 | null | null 制作电子计划|银行| 16:23:47 | 18:50:07 |空|空,mysql,join,Mysql,Join,D小提琴（mariadb_10.2） 顺便说一下，我没有让你的查询“按原样”工作，所以我无法比较结果 ---- 噢，当MySQL v8.x真正流行起来，并且它支持窗口函数，例如LAG（）OVER和LEAD（）OVER时，这个查询将更容易编写。如果您碰巧使用的是MariaDB或MySQL 8.x预发行版，您应该尝试使用这些窗口函数。如果您想“尝试”，我使用的dbfiddle确实支持这些函数。现在预期结果可用，我添加了一个不同的答案。我认为这更接近。我相信它可以像我以前的版本一样进行改进，但是（现在
噢，当MySQL v8.x真正流行起来，并且它支持窗口函数，例如
LAG（）OVERLEAD（）OVER与与一起使用
dbfiddle感谢您的输入，与我的查询相比，它的设置似乎已经好了一点，但是不是期望的结果（我应该在示例数据中指定），请参见我的文章底部，在这里我显示了示例数据的期望结果。在您的结果中，时间在timeOff（记录1）和timeOn（记录2）之间重复，这也是我的一个问题。你知道如何克服这个问题吗？这似乎是一个近乎完美的解决方案。这里唯一的问题是第4行和第5行的12:04:04重复，我们假设当一行中有两条RecordON记录时，上的第一条记录将丢失RecordOFF记录，因此第4行应该为空（如我问题中的预期结果所示）。我们目前正在运行MySQL5.7，但是8.x版的方法似乎更简洁，我将很快启动一个虚拟机来测试它！我添加了一个Jon和我一直在研究的解决方案。它可能没有那么优雅，你对这个问题有什么建议吗？这是5.7版的版本，因为它在我们的环境中可以正常工作，直到它稳定后，我们将迁移到8.0。在你有可用的窗口函数之前，我看不到优化能力。我相信你的解决方案是基于这个评论上面的一个，所以我在这个问题上的想法很多。“接受”就足够了吗？
Rec ON/OFF | RecordTime
RecON | 8:00:00
RecOFF | 9:00:00
RecOFF | 10:00:00
RecON | 11:00:00
RecOFF | 12:00:00
RecON | 14:00:00
RecON | 15:00:00
TimeRecON | TimeRecOFF
8:00 | 9:00
null | 10:00
11:00 | 12:00
14:00 | null
15:00 | null
INSERT INTO `tbltest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (4865,'Make-e-plan','BANK','2017-08-26 16:23:47','RecON','16:23:53');
INSERT INTO `tbltest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (4878,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','17:33:24');
INSERT INTO `tbltest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (4890,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','18:50:07');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (352,'Baobab','DILA','2017-08-16 07:55:52','RecON','08:58:45');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (377,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:50:42');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (379,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:51:13');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (382,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:56:36');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (384,'Baobab','DILA','2017-08-16 07:55:52','RecON','10:59:58');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (396,'Baobab','DILA','2017-08-16 07:55:52','RecON','11:20:45');
INSERT INTO `tblTest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`) VALUES (412,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','12:04:04');
SELECT `id`, `GroupName`, `Observer`, `ArrivalTime`, `Behaviour`, `RecOnTime`, `RecOffTime`, `PreviousContext`, `PreviousBehaviour`, `PreviousID`
FROM (
SELECT `id`, `GroupName`, `Observer`, `ArrivalTime`, `Behaviour`, `RecordTime` `RecOfftime`, -- note that the recordtime is RecOFF here
@lastContext `PreviousContext`,
@lastBehaviour `PreviousBehaviour`, @lastid `PreviousID`,
CASE
WHEN @lastBehaviour <> `Behaviour` -- The previous record has to be RecON (this statement could be re-written to = "RecON")
AND `Behaviour` = "RecOFF"
THEN @lastRecordTime
ELSE
CASE WHEN @lastBehaviour = 'RecON' AND `Behaviour`= 'RecON' -- IF there are two RecON instances after each other without a RecOFF then put the previous instance as first RecON
THEN @lastRecordTime
ELSE "00:00:00" -- IF RecOn and RecOFF do not match enter 0
END
END
AS `RecOnTime`,
@lastid := `id`,
@lastRecordTime := TIME(`RecordTime`),
@lastBehaviour := `Behaviour`,
FROM `KMP_adlib_testing`.`tblAdlibRaw`
WHERE `Behaviour` IN ('RecOn', 'RecOFF') -- This pre-filters for only RecON and RecOFF behaviours
AND `Observer` = @varObserver AND `GroupName` = @varGroupName AND ArrivalTime = @varArrivalTime
) as `tmp`
WHERE RecOnTime <> "00:00:00" -- This filters all records where there is no RecON for the behaviours.. This could be re-entered as where the Context is null????
;
Group | Observer | RecON | RecOFF
Baobab | DILA | 08:58:45 | 10:50:42
Baobab | DILA | null | 10:51:13
Baobab | DILA | null | 10:56:36
Baobab | DILA | 10:59:58 | null
Baobab | DILA | 11:20:45 | 12:04:04
Make-e-plan | BANK | 16:23:53 | 17:33:24
Make-e-plan | BANK | null | 18:50:07
select groupname
, observer
, ArrivalTime
, TimeOn
, case INNER2.rownum_difference WHEN 1 THEN INNER2.TimeOff ELSE NULL END AS TIMEOFF
FROM (
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (SELECT
MIN(t2.RecordTime)
FROM tblAdlibPreProcessing t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime
AND t2.GroupName = @groupname
AND t2.Observer = @observer
AND t2.ArrivalTime = @arrivaltime
)
TimeOff
-- This can remain out
-- , (SELECT id
-- FROM tbltest t3
-- WHERE t3.RecordTime = (SELECT MIN(t2.RecordTime)
-- FROM tblAdlibPreProcessing t2
-- WHERE t2.GroupName = t1.GroupName
-- AND t2.Observer = t1.Observer
-- AND t2.Behaviour = 'RecOFF'
-- AND t2.RecordTime > t1.RecordTime
-- AND t2.GroupName = @groupname
-- AND t2.Observer = @observer
-- AND t2.ArrivalTime = @arrivaltime
-- )
-- ) rownum_time_off
-- , t1.id as rownum_time_on
-- End this can be left out
, (SELECT id
FROM tblAdlibPreProcessing t3
WHERE 1=1
AND t3.GroupName = @groupname
AND t3.Observer = @observer
AND t3.ArrivalTime = @arrivaltime
AND t3.RecordTime = (SELECT MIN(t2.RecordTime)
FROM tblAdlibPreProcessing t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime
AND t2.GroupName = @groupname
AND t2.Observer = @observer
AND t2.ArrivalTime = @arrivaltime
)
) - t1.id as rownum_difference
FROM tblAdlibPreProcessing t1
WHERE Behaviour = 'RecON'
AND t1.GroupName = @groupname
AND t1.Observer = @observer
AND t1.ArrivalTime = @arrivaltime
) INNER2
UNION ALL
SELECT
ou.groupname
, ou.observer
, ou.ArrivalTime
, NULL
, ou.RecordTime
FROM (
-- off_unpaired
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime
, (SELECT
MAX(t2.RecordTime)
FROM tblAdlibPreProcessing t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecON'
AND t2.RecordTime < t1.RecordTime)
max_t2_rt
FROM tblAdlibPreProcessing t1
WHERE Behaviour = 'RecOFF'
AND t1.GroupName = @groupname
AND t1.Observer = @observer
AND t1.ArrivalTime = @arrivaltime
) ou
LEFT JOIN (
-- on_off_paired
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (SELECT
MIN(t2.RecordTime)
FROM tblAdlibPreProcessing t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime
AND t2.GroupName = @groupname
AND t2.Observer = @observer
AND t2.ArrivalTime = @arrivaltime)
TimeOff
FROM tblAdlibPreProcessing t1
WHERE Behaviour = 'RecON'
) oop ON ou.groupname = oop.groupname
AND ou.observer = oop.observer
AND ou.ArrivalTime = oop.ArrivalTime
AND ou.max_t2_rt = oop.TimeOn
AND ou.RecordTime = oop.TimeOff
WHERE oop.groupname IS NULL
ORDER BY 1, 2, 3, 4, 5;
create table `tbltest` (`id` int,`GroupName` varchar(40),`Observer` varchar(40),`ArrivalTime` time,`Behaviour` varchar(20),`RecordTime` time);
INSERT INTO `tbltest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`)
VALUES
(4865,'Make-e-plan','BANK','2017-08-26 16:23:47','RecON','16:23:53')
, (4878,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','17:33:24')
, (4890,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','18:50:07')
, (352,'Baobab','DILA','2017-08-16 07:55:52','RecON','08:58:45')
, (377,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:50:42')
, (379,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:51:13')
, (382,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:56:36')
, (384,'Baobab','DILA','2017-08-16 07:55:52','RecON','10:59:58')
, (396,'Baobab','DILA','2017-08-16 07:55:52','RecON','11:20:45')
, (412,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','12:04:04');
select
groupname,observer,ArrivalTime, t1.RecordTime
, (select min(t2.RecordTime)
from tbltest t2
where t2.GroupName = t1.GroupName and t2.Observer = t1.Observer
and t2.Behaviour = 'RecOFF' and t2.RecordTime > t1.RecordTime) min_t2_rt
from tbltest t1
where Behaviour = 'RecON'
union all
select
groupname,observer,ArrivalTime, t1.RecordTime
, (select min(t2.RecordTime)
from tbltest t2
where t2.GroupName = t1.GroupName and t2.Observer = t1.Observer
and t2.Behaviour = 'RecON' and t2.RecordTime > t1.RecordTime) min_t2_rt
from tbltest t1
where Behaviour = 'RecOFF'
order by 1,2,3,4
SELECT
groupname
, observer
, ArrivalTime
, TimeOn
, IF(@prev_value=TimeOff, NULL, TimeOff) TimeOff
, @prev_value := TimeOff x
FROM (
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (
SELECT
MIN(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime
)
TimeOff
FROM tbltest t1
WHERE Behaviour = 'RecON'
UNION ALL
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (
SELECT
MIN(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecON'
AND t2.RecordTime > t1.RecordTime
)
TimeOff
FROM tbltest t1
WHERE Behaviour = 'RecOFF'
ORDER BY
groupname
, observer
, ArrivalTime
, TimeOn
) d
CROSS JOIN (SELECT @row_num :=1, @prev_value :='00:00:00') vars
create table `tbltest` (`id` int,`GroupName` varchar(40),`Observer` varchar(40),`ArrivalTime` time,`Behaviour` varchar(20),`RecordTime` time);
INSERT INTO `tbltest` (`id`,`GroupName`,`Observer`,`ArrivalTime`,`Behaviour`,`RecordTime`)
VALUES
(4865,'Make-e-plan','BANK','2017-08-26 16:23:47','RecON','16:23:53')
, (4878,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','17:33:24')
, (4890,'Make-e-plan','BANK','2017-08-26 16:23:47','RecOFF','18:50:07')
, (352,'Baobab','DILA','2017-08-16 07:55:52','RecON','08:58:45')
, (377,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:50:42')
, (379,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:51:13')
, (382,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','10:56:36')
, (384,'Baobab','DILA','2017-08-16 07:55:52','RecON','10:59:58')
, (396,'Baobab','DILA','2017-08-16 07:55:52','RecON','11:20:45')
, (412,'Baobab','DILA','2017-08-16 07:55:52','RecOFF','12:04:04');
WITH on_off_paired AS (
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (SELECT
MIN(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime)
TimeOff
FROM tbltest t1
WHERE Behaviour = 'RecON'
)
, off_unpaired AS (
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime
, (SELECT
MAX(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecON'
AND t2.RecordTime < t1.RecordTime)
max_t2_rt
FROM tbltest t1
WHERE Behaviour = 'RecOFF'
)
SELECT
groupname
, observer
, ArrivalTime
, TimeOn
, TimeOff
FROM on_off_paired
UNION ALL
SELECT
ou.groupname
, ou.observer
, ou.ArrivalTime
, NULL
, ou.RecordTime
FROM off_unpaired ou
LEFT JOIN on_off_paired oop ON ou.groupname = oop.groupname
AND ou.observer = oop.observer
AND ou.ArrivalTime = oop.ArrivalTime
AND ou.max_t2_rt = oop.TimeOn
AND ou.RecordTime = oop.TimeOff
WHERE oop.groupname IS NULL
ORDER BY 1, 2, 3, 5;
-- where WITH is unavailable
SELECT
groupname
, observer
, ArrivalTime
, TimeOn
, TimeOff
FROM (
-- on_off_paired
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (SELECT
MIN(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime)
TimeOff
FROM tbltest t1
WHERE Behaviour = 'RecON'
) D1
UNION ALL
SELECT
ou.groupname
, ou.observer
, ou.ArrivalTime
, NULL
, ou.RecordTime
FROM (
-- off_unpaired
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime
, (SELECT
MAX(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecON'
AND t2.RecordTime < t1.RecordTime)
max_t2_rt
FROM tbltest t1
WHERE Behaviour = 'RecOFF'
) ou
LEFT JOIN (
-- on_off_paired
SELECT
groupname
, observer
, ArrivalTime
, t1.RecordTime TimeOn
, (SELECT
MIN(t2.RecordTime)
FROM tbltest t2
WHERE t2.GroupName = t1.GroupName
AND t2.Observer = t1.Observer
AND t2.Behaviour = 'RecOFF'
AND t2.RecordTime > t1.RecordTime)
TimeOff
FROM tbltest t1
WHERE Behaviour = 'RecON'
) oop ON ou.groupname = oop.groupname
AND ou.observer = oop.observer
AND ou.ArrivalTime = oop.ArrivalTime
AND ou.max_t2_rt = oop.TimeOn
AND ou.RecordTime = oop.TimeOff
WHERE oop.groupname IS NULL
ORDER BY 1, 2, 3, 5;