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create table tbl ( id serial, user_login text, device text, issued_at timestamp ); insert into tbl (user_login, device, issued_at) values ('ivanov', 'dev1', '2023-01-01'), ('ivanov', 'dev2', '2023-02-01'), ('petrov', 'dev3', '2023-03-01'), ('petrov', 'dev1', '2023-01-01'), ('sidorov', 'dev4', '2023-02-01'); with d as ( select *, row_number() over (partition by user_login order by issued_at) rn from tbl ) select * from d where rn = 1;
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