Hi can I know how to fetch the last updated record in the SQL server

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SQL-Server-2014

i have the two tables
1)Vechile Detials
2)Tracking table

Can any one help me how can i fetch the latest records of all the vehicles.

What I have tried:

select t.IMEINo,t.speed,t.Ignition,t.TrackTime,tblSATVehicles.VehicleNumber
from  Tracking t
inner join tblSATVehicles on t.IMEINo=tblSATVehicles.DeviceIMEI
inner join (
    select IMEINo, max(TrackTime) as maxtime
    from Tracking tm
    group by IMEINo
) tm on t.IMEINo = tm.IMEINo and t.TrackTime= tm.maxTime

Posted 27-Dec-18 4:17am

Member 14101734

Updated 27-Dec-18 7:31am

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OriginalGriff · Answer 1 · 2018-12-27T04:44:00

The only reliable way to fetch the latest data is to timestamp rows when you INSERT or UPDATE them: you can then use ORDER BY timeStampColumn DESC to get then in the right order, and TOP 1 to select just the latest item.

If you don't have a timestamp, then you cannot guarantee ordering - and that means your DB can return rows in any order it finds most appropriate. Which doesn't have to be the same order two times in a row!

RickZeeland · Answer 2 · 2018-12-27T07:32:00

Solution 2

Maybe you can use the OUTPUT clause, but this does not work with a select statement:
OUTPUT Clause (Transact-SQL) - SQL Server | Microsoft Docs[^]

Posted 27-Dec-18 7:32am

RickZeeland