SELECT T.ID, D.NOME, P.NOME, T.TURNO

FROM TURMA T, DISCIPLINA D, PROFESSOR P

WHERE D.ID = T.ID_DISCIPLINA

AND P.ID = T.ID_PROFESSOR;

SELECT TURMA.*, DISCIPLINA.NOME, PROFESSOR.NOME

FROM TURMA, DISCIPLINA, PROFESSOR

WHERE TURMA.ID = DISCIPLINA.ID_DISCIPLINA

AND TURMA.ID = PROFESSOR.ID_PROFESSOR;

SELECT ID, DISCIPLINA.NOME, PROFESSOR.NOME, TURNO

FROM TURMA, DISCIPLINA, PROFESSOR

WHERE ID = ID_DISCIPLINA

AND ID = ID_PROFESSOR; 

SELECT *

FROM TURMA T WHERE (SELECT NOME FROM DISCIPLINA

WHERE ID = T.ID_DISCIPLINA) > 0

AND (SELECT NOME FROM PROFESSOR WHERE ID = P.ID_DISCIPLINA) > 0

SELECT T.ID, D.NOME_DISCIPLINA, P.NOME_PROFESSOR, T.TURNO

FROM TURMA T, DISCIPLINA D, PROFESSOR P

WHERE T.ID_DISCIPLINA IN D.ID

AND T.ID_PROFESSOR IN P.ID;