sql 从manager_id = 3开始通过公司表旋转。将经理的姓名添加到结果中。

Posted 2021-05-14

WITH RSFC(EMPID,ENAME,MGRID,LVL) AS
  (SELECT EMPLOYEE_ID,
    EMPLOYEE_NAME,
    MANAGER_ID,
    0 AS LVL
  FROM COMPANY
  WHERE MANAGER_ID = 3
  UNION ALL
  SELECT EMPLOYEE_ID,
    EMPLOYEE_NAME,
    MANAGER_ID,
    LVL+1
  FROM RSFC R
  INNER JOIN COMPANY F
  ON F.MANAGER_ID = R.EMPID
  )
SELECT a.EMPID,
  a.ENAME,
  a.MGRID,
  a.LVL,
  B.EMPLOYEE_NAME AS MGR_NAME
FROM RSFC a
LEFT JOIN COMPANY B
ON a.MGRID = B.EMPLOYEE_ID
ORDER BY a.LVL,
  a.EMPID