sqlserver 树结构递归（向上递归和向下递归）

--获取当前及以下部门

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

　　

 --向上递归

   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

    )

　　向上递归和向下递归，其实就是反一反。以上语句因为要用到with as ，所以数据库要sqlserver2005以上。