sql server - SQL Group by date only choose 1 record -


i trying return 1 record following table not working. return multiple record.please advise, thank you

i suspect problem groupby

createdate              firstname eventid  2013-05-13 18:11:35.187 jack    0cd7b08a-0eaf-4515-9de1-00fc6db29a61 2013-05-13 18:11:35.310 paul    16a584d5-e9b7-4617-8dc9-089c628e0ed5 2013-05-13 20:14:33.863 craig   aaa21035-1377-443d-9bee-0c0761534803

here sql query result above:

 select max (createdate) create_date, firstname ,eventid     sessionsevents     trn='0391588'  group firstname , trn, eventid

its group data firstname after trn , after eventid trn persent in query , should same in resultset , firstname, eventid columns have not same data grouping , rows separate in resultset if need maximum create date should use top keyword sql server:

select top 1 max (createdate) create_date, firstname ,eventid sessionsevents trn='0391588' group firstname , trn, eventid

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