Tree Structure with Location & Designation

Question

hi,
i need to populate a tree structure with Department & Job,
so that first level will show the department, 2nd level the designation and 3rd the employees(sorted)
select b.dname, a.job, a.empno, a.ename
  from emp a, dept b
where a.deptno = b.deptno
order by 1,2,3
DNAME          JOB          EMPNO     ENAME
ACCOUNTING     CLERK          7934     MILLER
ACCOUNTING     MANAGER          7782     CLARK
ACCOUNTING     PRESIDENT     7839     KING
RESEARCH     ANALYST          7788     SCOTT
RESEARCH     ANALYST          7902     FORD
RESEARCH     CLERK          7369     SMITH
RESEARCH     CLERK          7876     ADAMS
RESEARCH     MANAGER          7566     JONES
SALES          CLERK          7900     JAMES
SALES          MANAGER          7698     BLAKE
SALES          SALESMAN     7499     ALLEN
SALES          SALESMAN     7521     WARD
SALES          SALESMAN     7654     MARTIN
SALES          SALESMAN     7844     TURNERThanks,
Noushad
Edited by: user517294 on Feb 27, 2010 7:01 PM

Answer 1

Or
SQL> with deptnos as (
  select distinct dname, e.deptno from emp e, dept d where e.deptno=d.deptno  order by e.deptno
jobs as (
select dname ||'/'|| max(job) over (partition by deptno order by job) hierarchy, deptno, job from (select distinct dname, e.deptno, job from emp e, deptnos d where e.deptno = d.deptno)
enames as
select e.deptno, j.hierarchy || '/' || max(ename) over (partition by e.job, e.deptno, ename order by hierarchy) hierarchy, ename from emp e, jobs j where e.job = j.job and e.deptno = j.deptno
select regexp_replace(hierarchy, '.*/', lpad('-',length(regexp_substr(hierarchy, '.*/')),'-')) hierarchy
  from (select dname hierarchy from deptnos
        union all
        select hierarchy from jobs
        union all
        select hierarchy from enames
        order by 1)
HIERARCHY                                                                      
ACCOUNTING                                                                     
-----------CLERK                                                               
-----------------MILLER                                                        
-----------MANAGER                                                             
-------------------CLARK                                                       
-----------PRESIDENT                                                           
---------------------KING                                                      
RESEARCH                                                                       
---------ANALYST                                                               
-----------------FORD                                                          
-----------------SCOTT                                                         
---------CLERK                                                                 
---------------ADAMS                                                           
---------------SMITH                                                           
---------MANAGER                                                               
-----------------JONES                                                         
SALES                                                                          
------CLERK                                                                    
------------JAMES                                                              
------MANAGER                                                                  
--------------BLAKE                                                            
------SALESMAN                                                                 
---------------ALLEN                                                           
---------------MARTIN                                                          
---------------TURNER                                                          
---------------WARD                                                            
26 rows selected.