Hi,
 Following code is working fine
 SELECT EmpId ,CAST(InTime AS DATE) as workingday ,EmpName,RIGHT('0' +  CONVERT(varchar, FLOOR(SUM( DATEDIFF( MI, InTime, OutTime)/60.0))) , 2)  + ':' + RIGHT('0' + CONVERT(varchar, SUM( DATEDIFF( MI, InTime,  OutTime))%60), 2) AS [total hour(s)],
 convert(varchar(5), max(OutTime)-MIN(InTime),108) as Emp_Intime,dstatus=
 (CASE
  WHEN CONVERT(TIME,MIN(InTime),108)>'08:35' and CONVERT(TIME,MIN(InTime),108) <'11:00' 
  THEN 'L'
   WHEN CONVERT(TIME,MIN(InTime),108)>'11:00' 
   THEN 'halfday' 
   else 'right' end ),CAST( RIGHT('0' + CONVERT(varchar, FLOOR(SUM(  DATEDIFF( MI, InTime, OutTime)/60.0))) , 2) + ':' + RIGHT('0' +  CONVERT(varchar, SUM( DATEDIFF( MI, InTime, OutTime))%60), 2)-CAST(  max(OutTime)-MIN(InTime) AS DATETIME) AS TIME) Extratime
 FROM Baiju.dbo.HbaEmp
 GROUP BY EmpId , EmpName, CAST(InTime AS DATE)
 
 empid workingday   Empname     total_hour(s)     Emp_Intime    status        Extratime
 2500    2014-01-01    Arunkumar    10:10                 09:40            L               00:30:00.0000000
 2502    2014-01-01    Arsh             07:48                  06:48          halfday      01:00:00.0000000
 2503    2014-01-01    RaJkumar    08:40                    08:10           L              00:30:00.0000000
 2504    2014-01-01    hari              NULL                 NULL           right           NULL
 2504    2014-01-01    Sini              08:55                    08:55           L             00:00:00.0000000
 my requirement is to find overtime.
 add a field Overtime .and condition is (Emp_Intime-00:45)-Extratime  and check if the value is above 8 hour the overtime is value-8 else  overtime is 0
 for example first record of above should be
 empid workingday   Empname     total_hour(s)     Emp_Intime    status        Extratime                overtime
 2500    2014-01-01    Arunkumar    10:10                 09:40            L               00:30:00.0000000   25
 ie (09:40-45)-30.
 ie 08:55-30=08:25
 overtime is 25 minutes
 How it is possible
 Regards
 Baiju