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create table e ( id integer primary key, name varchar(255) ); create table salaries ( id integer primary key, e_id integer, salary integer, foreign key (id) references e(id) ); insert into e (id, name) values (1, 'a'), (2, 'b'), (3, 'c'), (4, 'a'); insert into salaries values (1, 1, 12), (2, 2, 23), (3, 3, 23); delete from e, e ce where e.name=ce.name and e.id>ce.id; SELECT * FROM e;

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