How to calculate different between times in different hours? - sql

Question

I have the time-in and time-out of the employees. I can calculate the total hours out of it. The allow late mins are 30 per month. After crossing 30 mins threshold every minute will be calculated late.
The problem is that our office is divided into 4 times.
9:00 am to 11:00 am
11:15 am to 11:30 am (Break)
01:00 pm to 02:00 pm (Break)
02:00 pm to 05:00 pm
05:15 pm to 06:00 pm (Break)
Now if you come late after 09:00 am, it will be calculated late, if you come after 11:30 again late, same for 02:00 pm and 05:15 pm.
How would I calculate something like and wold contribute to late mins > 30.
For this I have 5 columns TimeIN, TimeOUT , TotalHours, AllowedLateMins adn employeeID.
SELECT DATEDIFF(MINUTE, TimeIN, , TimeOUT) AS TotalHours
But for the different breaks etc I can not calculate.
Update: For now I m doing this.
Select InTime, OutTime, DATEDIFF(Minute, InTime, OutTime) as Diff, Sum(DATEDIFF(Minute, InTime, OutTime))
Over(Order by e_id rows unbounded preceding) as Total
from [UNIS 22Dec].[dbo].[Tb_Compile_Attendance]
where e_id= 1001
Updte:
till now I hve done this.
Select top(1) TotalTimeTobeSpent from MinutesConfig
Declare #TimetoBeSpent int
Set #TimetoBeSpent = (Select top(1) TotalTimeTobeSpent from MinutesConfig)
Select top(1) TotalTimeTobeSpent from MinutesConfig
Declare #FlexiMins int
Set #FlexiMins = (Select top(1) FlexiMins from MinutesConfig)
Select InTime, OutTime, DATEDIFF(Minute, InTime, OutTime) as Diff,
SUM(DATEDIFF(Minute, InTime, OutTime)) Over() TotalHrs
from [UNIS 22Dec].[dbo].[Tb_Compile_Attendance]
Declare #RemFlxMins int
/****** Script for SelectTopNRows command from SSMS ******/
SELECT TOP 1000 [id] 'S.No'
,[e_date] 'Date'
,[e_id] 'Employee ID'
,[e_name] 'EmployeeName'
,[InTime]
,[OutTime]
,[Indate]
,[outdate],
DATEDIFF(Minute, Case when CAST(InTime AS time) < '08:30' then '08:30' else InTime end, Case when CAST(OutTime AS Time) > '18:00' then '18:00' when (CAST(OutTime AS Time) > '10:00' AND CAST(OutTime AS Time) < '10:15') then '10:00' else OutTime end) as 'Difference (Mins)',
#TimetoBeSpent 'TimeToBeSpent (Mins)',
SUM(DATEDIFF(Minute, Case when CAST(InTime AS time) < '08:30' then '08:30' else InTime end, Case when CAST(OutTime AS Time) > '18:00' then '18:00' when (CAST(OutTime AS Time) > '10:00' AND CAST(OutTime AS Time) < '10:15') then '10:00' else OutTime end)) Over() 'ActualTimeSpent (Mins)',
(#TimetoBeSpent - SUM(DATEDIFF(Minute, Case when CAST(InTime AS time) < '08:30' then '08:30' else InTime end,Case when CAST(OutTime AS Time) > '18:00' then '18:00' when (CAST(OutTime AS Time) > '10:00' AND CAST(OutTime AS Time) < '10:15') then '10:00' else OutTime end)) Over()) 'Late (Mins)',
(#FlexiMins - (#TimetoBeSpent - SUM(DATEDIFF(Minute, Case when CAST(InTime AS time) < '08:30' then '08:30' else InTime end,Case when CAST(OutTime AS Time) > '18:00' then '18:00' when (CAST(OutTime AS Time) > '10:00' AND CAST(OutTime AS Time) < '10:15') then '10:00' else OutTime end)) Over())) 'RemainingFlexiMins',
#FlexiMins as AllowedFlexiMins
FROM [Tb_Compile_Attendance]
where InTime is not null and outtime is not null
Output:
S.No Date Employee ID InTime OutTime Indate outdate Difference (Mins) TimeToBeSpent (Mins) ActualTimeSpent (Mins) Late (Mins) RemainingFlexiMins AllowedFlexiMins
145 20190721 1001 08:30 10:01 20190721 20190721 90 480 476 4 86 90
164 20190721 1001 10:16 13:00 20190721 20190721 164 480 476 4 86 90
165 20190721 1001 14:03 16:15 20190721 20190721 132 480 476 4 86 90
166 20190721 1001 16:30 18:01 20190721 20190721 90 480 476 4 86 90

Answer 1

I created a table with work periods (the periods when a worker MUST be at work, without breaks). Here's my version of periods, change these data as you need:
create table dbo.WorkTimePeriods
(
FromTime time not null,
TillTime time not null,
constraint pk_dbo_worktimeperiods primary key (FromTime, TillTime),
)
go
insert dbo.WorkTimePeriods
(FromTime,TillTime)
values (cast('09:00:00 am' as time),cast('11:00:00 am' as time)),
(cast('11:30:00 am' as time),cast('01:00:00 pm' as time)),
(cast('02:00:00 pm' as time),cast('06:00:00 pm' as time))
So, the resulting query looks like this (with my sample data for Employees visiting):
;with cte as
(
select *
from (
values (1, cast('20190101 08:59:00' as datetime), cast('20190101 11:00:53' as datetime)), -- this guy is normal one
(1, cast('20190101 11:29:50' as datetime), cast('20190101 13:05:00' as datetime)),
(1, cast('20190101 13:58:31' as datetime), cast('20190101 18:05:10' as datetime)),
(2, cast('20190101 08:59:00' as datetime), cast('20190101 18:00:53' as datetime)), -- this guy works without breaks - workaholic!
(3, cast('20190101 09:09:11' as datetime), cast('20190101 12:59:20' as datetime)), -- this guy was late and went after the afternoon - lazy one!
(4, cast('20190101 09:00:55' as datetime), cast('20190101 11:02:30' as datetime)), -- this guy is a normal one as well, but he is a bit late sometimes
(4, cast('20190101 11:28:22' as datetime), cast('20190101 13:05:10' as datetime)),
(4, cast('20190101 13:55:09' as datetime), cast('20190101 18:01:12' as datetime))
) as EmplWT (EmployeeId, InTime, OutTime)
),
cte2 as
(
select cast('20190101' as date) as CalendarDate
)
select v1.EmployeeId,
v1.CalendarDate,
sum(v1.PastDueTimeInSec/60.0) as PastDueTimeInMin,
sum((v1.WorkTimeInSec-v1.PastDueTimeInSec) / 60.0) as WorkTimeInMin
from (
select v3.EmployeeId,
t2.CalendarDate,
case when v4.EmployeeId is not null then 0
when v5.EmployeeId is null then datediff(SECOND, cast(t1.FromTime as datetime), cast(t1.TillTime as datetime))
else
case when v5.InTime > cast(t1.FromTime as datetime) + cast(t2.CalendarDate as datetime) then datediff(SECOND, cast(t1.FromTime as datetime) + cast(t2.CalendarDate as datetime), v5.InTime) else 0 end +
case when v5.OutTime < cast(t1.TillTime as datetime) + cast(t2.CalendarDate as datetime) then datediff(SECOND, v5.InTime, cast(t1.TillTime as datetime) + cast(t2.CalendarDate as datetime)) else 0 end
end as PastDueTimeInSec,
datediff(SECOND,cast(t1.FromTime as datetime), cast(t1.TillTime as datetime)) as WorkTimeInSec
from dbo.WorkTimePeriods t1
cross join cte2 t2
cross join (
select EmployeeId
from cte
group by EmployeeId
) v3
left join (
select t1.EmployeeId,
t1.InTime,
t1.OutTime
from cte t1
) v4 on cast(t1.FromTime as datetime) + cast(t2.CalendarDate as datetime) between v4.InTime and v4.OutTime
and cast(t1.TillTime as datetime) + cast(t2.CalendarDate as datetime) between v4.InTime and v4.OutTime
and v4.EmployeeId = v3.EmployeeId
left join (
select t1.EmployeeId,
t1.InTime,
t1.OutTime
from cte t1
) v5 on v5.InTime between cast(t1.FromTime as datetime) + cast(t2.CalendarDate as datetime) and cast(t1.TillTime as datetime) + cast(t2.CalendarDate as datetime)
and v5.EmployeeId = v3.EmployeeId
) v1
group by v1.EmployeeId,
v1.CalendarDate
Pay attention, you need to create a Calendar with work dates (in my case it's CTE2).
Result:
+------------+--------------+------------------+---------------+
| EmployeeId | CalendarDate | PastDueTimeInMin | WorkTimeInMin |
+------------+--------------+------------------+---------------+
| 1 | 01.01.2019 | 0.000000 | 450.000000 |
| 2 | 01.01.2019 | 0.000000 | 450.000000 |
| 3 | 01.01.2019 | 339.183333 | 110.816666 |
| 4 | 01.01.2019 | 0.916666 | 449.083333 |
+------------+--------------+------------------+---------------+
I hope this will help you. Good luck!:)