What is the Query for see hierarchy data from self-referencing tables

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I have table EmployeeMaster like

SQL

EmpID   Name    ReportingEmployeeID
EMP001	A	EMP002
EMP002	B	EMP004
EMP003	C	EMP008
EMP004	D	EMP003
EMP008	E	EMP233
EMP233	F	EMP122
EMP122	G	EMP006

now i want to see Hierarchy of employee like first EmpID then his ReportingEmpId then his ReportingEmpId and so on.....

from above table i want output like

SQL

EMP001
EMP002
EMP004
EMP003
EMP008
EMP233
EMP122
EMP006

What is the Query for this Hierarchy

Posted 5-Jun-14 20:36pm

ErBhati

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_Asif_ · Answer 1 · 2014-06-05T20:43:00

Solution 1

There are tons of articles available regarding hierarchal queries. Try below google search

Hierarchical query CTE SQL Server[^]

Posted 5-Jun-14 20:43pm

_Asif_

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ErBhati 6-Jun-14 2:46am

Thanks for reply but i have already search but not getting proper Query what i want.

ErBhati · Answer 2 · 2014-06-05T21:31:00

WITH UserCTE AS (
SELECT EmpCode, EmpName, ReportingManagerCode,0 AS steps
FROM EMP_MASTER
WHERE ReportingManagerCode = 'EMP001'
UNION ALL

SELECT mgr.EmpCode, mgr.EmpName, mgr.ReportingManagerCode, usr.steps +1 AS steps
FROM UserCTE AS usr
INNER JOIN EMP_MASTER AS mgr
ON usr.ReportingManagerCode = mgr.EmpCode
)
SELECT * FROM UserCTE AS u