Hello
I have a table GPSDATA which consists of
VehicleNo,Speed ,CurrentDate,sl no,status
This data gets updated every minute.And every minute the slno(serial no) will be incremented automatically.
The status field shows whether the vehicle is moving or idle(That is neither in stop nor in moving) position
The user will choose the vehicleno(From the Front End which is VB.net 2005)
and I want to display the time difference between the current time and the latest time of the vehicle.
I will check that if the status is in idle and the time difference is more than 30 minutes then make the status as stop.
Kindly let me know how to frame this query.
Thanks
cmrhema
2  3180 
Hello
I have a table GPSDATA which consists of
VehicleNo,Speed ,CurrentDate,sl no,status
This data gets updated every minute.And every minute the slno(serial no) will be incremented automatically.
The status field shows whether the vehicle is moving or idle(That is neither in stop nor in moving) position
The user will choose the vehicleno(From the Front End which is VB.net 2005)
and I want to display the time difference between the current time and the latest time of the vehicle.
I will check that if the status is in idle and the time difference is more than 30 minutes then make the status as stop.
Kindly let me know how to frame this query.
Thanks
cmrhema
Get the latest date of the vehicle using:
SELECT TOP 1
@slno = slno,
@lastDate = CurrentDate
FROM YourTable
WHERE VehicleNo = @vehicleno
ORDER BY CurrentDate DESC
Then compare the dates of the records using:
IF DATEDIFF(minute , @lastDate, GETDATE()) > 30 BEGIN
UPDATE YourTable
SET status = 'stop'
WHERE slno = @slno
END
Get the latest date of the vehicle using:
SELECT TOP 1
@slno = slno,
@lastDate = CurrentDate
FROM YourTable
WHERE VehicleNo = @vehicleno
ORDER BY CurrentDate DESC
Then compare the dates of the records using:
IF DATEDIFF(minute , @lastDate, GETDATE()) > 30 BEGIN
UPDATE YourTable
SET status = 'stop'
WHERE slno = @slno
END
Thanks solved the problem
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