get latest record for each ID

Question

I would like to get the latest record for each server.

Here is some example data:

TimeGenerated        SourceName            ComputerName  Message
2014-1         


        

Answer 1

SELECT *
FROM yourtable
INNER JOIN (
   SELECT MAX(timeGenerated) as maxtime, ComputerName
   FROM yourtable
   GROUP BY ComputerName
) AS latest_record ON (yourtable.timeGenerated = maxtime)
   AND (latest_record.ComputerName = yourtable.ComputerName)

Inner query gets the latest timestamp for every computer name. The outer query then joins against that query result to fetch the rest of the fields from the table, based on the time/computername the inner query finds. If you have two events logged with identical max times, you'd get two records for that computername.