create table candidatos (id int auto_increment primary key, sq_candidato int, nome varchar(50));
insert into candidatos values (1, 250010, 'Fulano');
insert into candidatos values (2, 250010, 'Fulano');
insert into candidatos values (3, 250013, 'Beltrano');
insert into candidatos values (4, 250013, 'Beltrano');
insert into candidatos values (5, 250015, 'Sicrano');
 
-- Tabela atual
select * from candidatos;
 
-- Linhas a serem removidas (duplicadas)
select candidatos.id from candidatos
inner join candidatos c on c.sq_candidato = candidatos.sq_candidato
where c.id <> candidatos.id
group by candidatos.sq_candidato;
 
--Removendo as linhas
delete from candidatos where id in(
	select candidatos.id from candidatos
	inner join candidatos c on c.sq_candidato = candidatos.sq_candidato
	where c.id <> candidatos.id
	group by candidatos.sq_candidato
);
 
-- Tabela atualizada
select * from candidatos;

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