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SQL Recursive Employee hierarchy

BrKakarottDev answered on October 20, 2022 Popularity 3/10 Helpfulness 7/10

answer SQL Recursive Employee hierarchy

SQL Recursive Employee hierarchy

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WITH EMPLVL AS (
--anchor
SELECT E.Employee_id, E.Employee_name, E.Manager_id, E.Manager_name , 0 AS Employee_level
,[Path_id] = CAST(E.Employee_id AS NVARCHAR(MAX))
,[Path_name] = CAST(E.Employee_name AS NVARCHAR(MAX))
FROM EMPLOYEE E
WHERE E.Manager_id IS NULL

UNION ALL 
--Recursive
SELECT E.Employee_id, E.Employee_name, E.Manager_id, E.Manager_name , L.Employee_level + 1 as Employee_level
,[Path_id] = CONCAT(CAST([Path_id] AS NVARCHAR(MAX)),  N' / ', CAST(E.Employee_id AS NVARCHAR(MAX)))
,[Path_name] = CONCAT(CAST([Path_name] AS NVARCHAR(MAX)),  N' / ', CAST(E.Employee_name AS NVARCHAR(MAX)))
FROM EMPLOYEE E
INNER JOIN EMPLVL L ON E.Manager_id = L.Employee_id
)

SELECT * FROM EMPLVL
ORDER BY Employee_level

Popularity 3/10 Helpfulness 7/10 Language sql

Source: Grepper

Tags: hierarchy sql

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Contributed on Oct 20 2022

BrKakarottDev

0 Answers Avg Quality 2/10

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