sqlserver 樹結構遞歸（向上遞歸和向下遞歸）

--獲取當前及以下部門
Create proc GetCurrentAndUnderOrg
@orgId int
as
begin
    WITH cte 
    AS
    (
        SELECT * ,0 AS level FROM Static_Organ  WHERE OrganID=@orgId
        UNION ALL
        SELECT g.*,level+1 FROM Static_Organ g INNER JOIN cte 
             ON g.ParentOrgan=cte.OrganID
    )
    SELECT * FROM cte
end

　　

 --向上遞歸
   WITH cte 
    AS
    (
        SELECT * ,LevelIndex AS level FROM EL_Departments  WHERE ID=170
        UNION ALL
        SELECT g.*,g.LevelIndex AS level FROM EL_Departments g INNER JOIN cte 
             ON g.Id=cte.ParentId
    )

　　向上遞歸和向下遞歸，其實就是反一反。以上語句因為要用到with as ，所以數據庫要sqlserver2005以上。