Iterando cursor com "FOR IN"

sample_cursor_in.pls

CREATE OR REPLACE PROCEDURE SAMPLE_CURSOR_IN AS      
    CURSOR UFS IS     
        SELECT ID_UF, NM_UF      
          FROM UNIDADES_FEDERACAO;      
    BEGIN      
      FOR J IN UFS      
      LOOP      
        CONTENT := '{"sigla":"'|| J.ID_UF ||'","nome":"'|| J.NM_UF ||'"}';  
      END LOOP;            
      DBMS_OUTPUT.PUT_LINE(CONTENT);
  END; --SAMPLE_CURSOR_IN