start with job = 'MANAGER' and connect by prior : CONNECT « Query Select « Oracle PL/SQL Tutorial

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SQL>
SQL> column  full_path format a40
SQL>
SQL>
SQL> create table employees(
  2    empno      NUMBER(4)
  3  , ename      VARCHAR2(8)
  4  , init       VARCHAR2(5)
  5  , job        VARCHAR2(8)
  6  , mgr        NUMBER(4)
  7  , bdate      DATE
  8  , msal       NUMBER(6,2)
  9  , comm       NUMBER(6,2)
 10  , deptno     NUMBER(2) ) ;

Table created.

SQL>
SQL>
SQL> insert into employees values(1,'Jason',  'N',  'TRAINER', 2,   date '1965-12-18',  800 , NULL,  10);

1 row created.

SQL> insert into employees values(2,'Jerry',  'J',  'SALESREP',3,   date '1966-11-19',  1600, 300,   10);

1 row created.

SQL> insert into employees values(3,'Jord',   'T' , 'SALESREP',4,   date '1967-10-21',  1700, 500,   20);

1 row created.

SQL> insert into employees values(4,'Mary',   'J',  'MANAGER', 5,   date '1968-09-22',  1800, NULL,  20);

1 row created.

SQL> insert into employees values(5,'Joe',    'P',  'SALESREP',6,   date '1969-08-23',  1900, 1400,  30);

1 row created.

SQL> insert into employees values(6,'Black',  'R',  'MANAGER', 7,   date '1970-07-24',  2000, NULL,  30);

1 row created.

SQL> insert into employees values(7,'Red',    'A',  'MANAGER', 8,   date '1971-06-25',  2100, NULL,  40);

1 row created.

SQL> insert into employees values(8,'White',  'S',  'TRAINER', 9,   date '1972-05-26',  2200, NULL,  40);

1 row created.

SQL> insert into employees values(9,'Yellow', 'C',  'DIRECTOR',10,  date '1973-04-27',  2300, NULL,  20);

1 row created.

SQL> insert into employees values(10,'Pink',  'J',  'SALESREP',null,date '1974-03-28',  2400, 0,     30);

1 row created.

SQL>
SQL>
SQL>
SQL> select  ename
  2  ,       connect_by_root ename            as manager
  3  ,       sys_connect_by_path(ename,' > ') as full_path
  4  from    employees
  5  start   with job = 'MANAGER'
  6  connect by prior empno = mgr;

     last_name       MANAGER  FULL_PATH
-------------------- -------- ----------------------------------------
Mary                 Mary      > Mary
Jord                 Mary      > Mary > Jord
Jerry                Mary      > Mary > Jord > Jerry
Jason                Mary      > Mary > Jord > Jerry > Jason
Black                Black     > Black
Joe                  Black     > Black > Joe
Mary                 Black     > Black > Joe > Mary
Jord                 Black     > Black > Joe > Mary > Jord
Jerry                Black     > Black > Joe > Mary > Jord > Jerry
Jason                Black     > Black > Joe > Mary > Jord > Jerry > J
                              ason

Red                  Red       > Red
Black                Red       > Red > Black
Joe                  Red       > Red > Black > Joe
Mary                 Red       > Red > Black > Joe > Mary
Jord                 Red       > Red > Black > Joe > Mary > Jord
Jerry                Red       > Red > Black > Joe > Mary > Jord > Jer
                              ry

     last_name       MANAGER  FULL_PATH
-------------------- -------- ----------------------------------------

Jason                Red       > Red > Black > Joe > Mary > Jord > Jer
                              ry > Jason


17 rows selected.

SQL>
SQL> drop table employees;

Table dropped.

SQL>