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Select latest Timestamp values with group by

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Dear all,

I need to write a query to select latest rows with timestamp values.
My ID is repeated with lat lon and timestamp. I want the latest row of each ID ( group by id ).

Snapshot of small dataset :-

"3903";"661000212";34.3000000312542;74.4666670842472;0;"2011-10-10 12:47:33.360572" "3904";"661000212";24.816667028954;93.9500000453283;0;"2011-10-10 12:47:33.360572" "3905";"661000212";24.816667028954;93.9500000453283;0;"2011-10-20 12:47:33.360572" "3906";"661000213";24.816667028954;93.9500000453283;0;"2011-10-10 12:47:33.360572" "3907";"661000212";24.816667028954;93.9500000453283;0;"2011-10-10 12:47:33.360572" "3908";"661000212";24.816667028954;93.9500000453283;0;"2011-10-10 12:47:33.360572" "3909";"661000212";25.1166670062712;94.3666669968243;0;"2011-10-10 12:47:33.360572" "3910";"661000213";26.8491101532852;92.8058205131302;0;"2011-10-10 12:47:33.360572" "3911";"661000212";26.8491101532852;92.8058205131302;0;"2011-10-14 12:47:33.360572"


Can anyone let me know the query for that.


Thanks

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