sqlserver通過遞歸查找所有下級或上級部門和用戶的操作實例

--查找當前用戶所在部門的所有下級包括當前部門
with cte as
(
    select Id,Pid,DeptName, 0 as lvl from Department
    where Id = 2
    union all
    select d.Id,d.Pid,d.DeptName,lvl + 1 from cte c inner join Department d
    on c.Id = d.Pid --id 部門編號，PID 上級部門編號
)
select * from cte

查找當前用戶所在部門的所有上級包括當前部門
with cte as
(
    select Id,Pid,DeptName, 0 as lvl from Department
    where Id = 2
    union all
    select d.Id,d.Pid,d.DeptName,lvl + 1 from cte c inner join Department d
    on c.Pid= d.Id --id 部門編號，PID 上級部門編號

) select * from cte