SQLserver2008使用表達式遞歸查詢

sqlserver2008使用表達式遞歸查詢語句，需要的朋友可以參考下。

代碼如下:
–由父項遞歸下級
with cte(id,parentid,text)
as
(–父項
select id,parentid,text from treeview where parentid = 450
union all
–遞歸結果集中的下級
select t.id,t.parentid,t.text from treeview as t
inner join cte as c on t.parentid = c.id
)
select id,parentid,text from cte

———————

–由子級遞歸父項
with cte(id,parentid,text)
as
(–下級父項
select id,parentid,text from treeview where id = 450
union all
–遞歸結果集中的父項
select t.id,t.parentid,t.text from treeview as t
inner join cte as c on t.id = c.parentid
)
select id,parentid,text from cte