text: create table aluno(
  	matricula int identity,
  	nome varchar(20)unique,
  	constraint pk_aluno primary key (matricula)
  );
  
  create table prova(
  	id int identity primary key, 
  	nota int,
  	matricula int foreign key references aluno (matricula)
  
  );
  
  insert into aluno (nome)
  values
  ('Joao'), ('Eric')...
  
  insert into prova (matricula)
  values
  (null)
  
  select * from prova
  
  
  