Questão 2117795

SELECT * FROM UF, REPRESENTANTES WHERE REPRESENTANTES IS NULL;

SELECT SIGLAUF FROM REPRESENTANTES, AREAATUACAO WHERE AREAATUACAO.IDREPRESENTANTE = AREAATUACAO.IDREPRESENTANTE;

SELECT SIGLAUF FROM REPRESENTANTES LEFT JOIN AREAATUACAO ON REPRESENTANTE.IDREPRESENTANTE = AREAATUACAO.IDREPRESENTANTE WHERE AREAATUACAO.IDREPRESENTANTES IS NULL;

SELECT UF. SIGLA FROM UF LEFT JOIN AREAATUACAO ON UF.SIGLA = AREAATUACAO.SIGLAUF WHERE AREAATUACAO.SIGLAUF IS NULL;