SQL> @siblings_without_orderby

Reports To                     EMPLOYEE_ID                                     
------------------------------ -----------                                      
Kochhar                                101                                     
  Whalen                               200                                     
  Mavris                               203                                      
  Baer                                 204                                     
  Higgins                              205                                     
    Gietz                              206                                     
  Greenberg                            108                                     
    Faviet                             109                                     
    Chen                               110                                     
    Sciarra                            111                                     
    Urman                              112                                     
    Popp                               113                                     
De Haan                                102                                     
  Hunold                               103                                     
    Ernst                              104                                     
    Austin                             105                                      
    Pataballa                          106                                     
    Lorentz                            107                                     

18 rows selected.

SQL> @siblings_with_orderby

Reports To                     EMPLOYEE_ID                                     
------------------------------ -----------                                     
De Haan                                102                                     
  Hunold                               103                                     
    Austin                             105                                     
    Ernst                              104                                     
    Lorentz                            107                                     
    Pataballa                          106                                     
Kochhar                                101                                     
  Baer                                 204                                      
  Greenberg                            108                                     
    Chen                               110                                     
    Faviet                             109                                      
    Popp                               113                                     
    Sciarra                            111                                     
    Urman                              112                                      
  Higgins                              205                                     
    Gietz                              206                                     
  Mavris                               203                                     
  Whalen                               200                                     

18 rows selected.

SQL>