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with cte as( select '5' as user, 'Albert' as name , 'US' as country, 'Mac' as device ,'5' as event_ct union all select '5' as user, 'Albert' as name , 'GB' as country, 'Phone' as device ,'7' as event_ct union all select '5' as user, 'Albert' as name , 'CN' as country, 'Mac' as device ,'3' as event_ct union all select '6' as user, 'Albert' as name , 'CN' as country, 'Mac' as device ,'1' as event_ct union all select '7' as user, 'Laurel' as name , 'US' as country, 'Phone' as device ,'7' as event_ct ) select user,name,country,device from cte where event_ct in (select max(event_ct) from cte group by user,name)
user
name
country
device
5
Albert
GB
Phone
6
Albert
CN
Mac
7
Laurel
US
Phone