Questões de Concurso Para cemig - mg

SELECT c.nome FROM CLIENTE c

WHERE c.numero NOT IN

(SELECT ct.numero FROM CLIENTE_TELEFONE ct);

SELECT c.nome FROM CLIENTE c

LEFT JOIN CLIENTE_TELEFONE ct ON c.numero = ct.cliente

WHERE ct.telefone IS NULL;

SELECT c.nome FROM CLIENTE c

WHERE c.numero NOT EXISTS

(SELECT cliente FROM CLIENTE_TELEFONE);

SELECT c.nome FROM CLIENTE c

WHERE NOT EXISTS (SELECT * FROM CLIENTE_TELEFONE

        WHERE telefone = c.numero);

DELETE FROM CONSUMO

WHERE instalacao IN

(SELECT numero FROM INSTALACAO WHERE cliente = 10);

DELETE FROM INSTALACAO

WHERE cliente = 10;

DELETE FROM CONSUMO

WHERE numero IN

(SELECT numero FROM INSTALACAO WHERE cliente = 10);

DELETE FROM CONSUMO

WHERE instalacao = 10;