All the supervisor for a SQL Oracle employee hierarchy
Hello
We can print any employee hierarchy for each employee using oracle SQL hierarchical query. PFB to the data table and exit examples that I need.
Example of employee table
EMPID | ENAME | MGRID |
1 | A | 1 |
2 | B | 1 |
3 | C | 2 |
4 | D | 2 |
5 | E | 3 |
Example of output
EMPID | ENAME | Hierarchy |
1 | A | - |
2 | B | / 1 |
3 | C | / 1/2 |
4 | D | / 1/2 |
5 | E | / 1/2/3 |
Thanks in advance.
You can use the hierarchical query
SQL> select empno, ename, sys_connect_by_path(nvl(to_char(mgr), 'BOSS'), '/') mgr_list 2 from emp 3 start with mgr is null 4 connect by prior empno = mgr; EMPNO ENAME MGR_LIST ---------- ------ -------------------------------------------------- 7839 KING /BOSS 7566 JONES /BOSS/7839 7788 SCOTT /BOSS/7839/7566 7876 ADAMS /BOSS/7839/7566/7788 7698 BLAKE /BOSS/7839 7499 ALLEN /BOSS/7839/7698 7521 WARD /BOSS/7839/7698 7654 MARTIN /BOSS/7839/7698 7844 TURNER /BOSS/7839/7698 7782 CLARK /BOSS/7839 10 rows selected.
Tags: Database
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