Hierarchical Query for generating a tree for a given node value

Question

Hi,
I have a requirement where i want to populate a tree only populating the structure that contains a given value.
For ex. the complete structure for emp table is
PATH
-> SCOTT
-> SCOTT -> ADAMS
-> FORD
-> FORD -> SMITH
-> ALLEN
-> JAMES
-> TURNER
-> MARTIN
-> WARD
-> MILLER
-> ADAMS
-> JONES
-> JONES -> SCOTT
-> JONES -> SCOTT -> ADAMS
-> JONES -> FORD
-> JONES -> FORD -> SMITH
-> CLARK
-> CLARK -> MILLER
-> BLAKE
-> BLAKE -> ALLEN
-> BLAKE -> JAMES
-> BLAKE -> TURNER
-> BLAKE -> MARTIN
-> BLAKE -> WARD
-> SMITH
-> KING
-> KING -> JONES
-> KING -> JONES -> SCOTT
-> KING -> JONES -> SCOTT -> ADAMS
-> KING -> JONES -> FORD
-> KING -> JONES -> FORD -> SMITH
-> KING -> CLARK
-> KING -> CLARK -> MILLER
-> KING -> BLAKE
-> KING -> BLAKE -> ALLEN
-> KING -> BLAKE -> JAMES
-> KING -> BLAKE -> TURNER
-> KING -> BLAKE -> MARTIN
-> KING -> BLAKE -> WARD
and I would need only those records that has SCOTT, so the expected output would be
-> SCOTT
-> SCOTT -> ADAMS
-> JONES -> SCOTT
-> JONES -> SCOTT -> ADAMS
-> KING -> JONES -> SCOTT
-> KING -> JONES -> SCOTT -> ADAMS
How can this be achieved. Any help will be appreciated.

Answer 1

script for create tabel
CREATE TABLE EMP
  EMPNO     NUMBER(4),
  ENAME     VARCHAR2(10 BYTE),
  JOB       VARCHAR2(9 BYTE),
  MGR       NUMBER(4),
  HIREDATE  DATE,
  SAL       NUMBER(7,2),
  COMM      NUMBER(7,2),
  DEPTNO    NUMBER(2)
)script for insert
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7369, 'SMITH', 'CLERK', 7902, TO_DATE('12/17/1980 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 800, 20);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
Values
   (7499, 'ALLEN', 'SALESMAN', 7698, TO_DATE('02/20/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1600, 300, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
Values
   (7521, 'WARD', 'SALESMAN', 7698, TO_DATE('02/22/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1250, 500, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7566, 'JONES', 'MANAGER', 7839, TO_DATE('04/02/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 2975, 20);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
Values
   (7654, 'MARTIN', 'SALESMAN', 7698, TO_DATE('09/28/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1250, 1400, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7698, 'BLAKE', 'MANAGER', 7839, TO_DATE('05/01/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 2850, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7782, 'CLARK', 'MANAGER', 7839, TO_DATE('06/09/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 2450, 10);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7788, 'SCOTT', 'ANALYST', 7566, TO_DATE('04/19/1987 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 3000, 20);
Insert into EMP
   (EMPNO, ENAME, JOB, HIREDATE, SAL, DEPTNO)
Values
   (7839, 'KING', 'PRESIDENT', TO_DATE('11/17/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 5000, 10);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)
Values
   (7844, 'TURNER', 'SALESMAN', 7698, TO_DATE('09/08/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1500, 0, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7876, 'ADAMS', 'CLERK', 7788, TO_DATE('05/23/1987 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1100, 20);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7900, 'JAMES', 'CLERK', 7698, TO_DATE('12/03/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 950, 30);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7902, 'FORD', 'ANALYST', 7566, TO_DATE('12/03/1981 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 3000, 20);
Insert into EMP
   (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, DEPTNO)
Values
   (7934, 'MILLER', 'CLERK', 7782, TO_DATE('01/23/1982 00:00:00', 'MM/DD/YYYY HH24:MI:SS'), 1300, 10);
COMMIT;