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create table cg( id integer, first_name varchar(100), last_name varchar(100) ); insert into cg(id, first_name, last_name) values (512020204, 'AARON', 'JOHNSON'), (304030303, 'AARON', 'JOHNSON'), (002293993, 'ABEL', 'MARTINEZ'), (383893933, 'ALEX', 'JONES');
4 rows affected
select id from ( select id, count(id) over (partition by first_name, last_name) as n from cg ) as t where t.n > 1 ;
id
512020204
304030303