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create table #temp ( aNumber int ,aDatetime datetime ,alphanumericID varchar(100) ); insert into #temp(aNumber,aDatetime,alphaNumericID) select 1234, '2018-09-18 20:13:00','AZ47T' UNION ALL select 4567, '2018-09-18 21:13:00','ZTv487' UNION ALL select 1234, '2018-09-18 22:13:00','45ZTv'; ;WITH cteSource AS (SELECT aNumber,aDatetime,alphaNumericID ,ROW_NUMBER() OVER(PARTITION BY aNumber ORDER BY aDatetime DESC) as rn FROM #temp ) SELECT aNumber,alphaNumericID FROM cteSource as s WHERE s.rn =1
aNumber
alphaNumericID
1234
45ZTv
4567
ZTv487