Find the time difference between two consecutive rows in the same table in sql

Question

I\'m stuck. I\'ve looked for an answer, but can\'t seem to find subtracting time in the same table from two different rows of the same table that fits. I\'m having a difficu

Answer 1

I have solved this for similar problems and it need not be that the rows even be sorted:

select t1.EmpID, t1.TimeIn, t1.TimeOut, 
       datediff(minute, max(t2.TimeOut), t1.TimeIn) as minutes
from timesheet t1 left join timesheet t2 on t1.EmpID = t2.EmpID 
       and t2.TimeOut < t1.TimeIn
group by t1.EmpID, t1.TimeIn, t1.TimeOut

Let me know if this works.

Here is a sql fiddle: http://sqlfiddle.com/#!3/89a43/1