;with f as
(
select * from tb where ClassID=6
union all
select a.* from tb a join f on a.ClassID=f.ClassParentID
)
select * from f

------解决方案--------------------
SQL code

--> 测试数据：[tbl]
go
if object_id('[tbl]') is not null 
drop table [tbl]
go
create table [tbl](
[ClassID] int,
[ClassName] varchar(8),
[ClassParentID] int
)
go
insert [tbl]
select 1,'信息',0 union all
select 2,'视频',0 union all
select 3,'新闻频道',1 union all
select 4,'情感',3 union all
select 5,'家庭',4 union all
select 6,'绯闻',4 union all
select 7,'搞笑视频',2 union all
select 8,'悲剧视频',2

;with T 
as
(
select * from [tbl] where ClassID=6
union all
select a.* from [tbl] a 
join T on a.ClassID=T.ClassParentID
)
select * from T
order by ClassParentID

/*
ClassID    ClassName    ClassParentID
1    信息    0
3    新闻频道    1
4    情感    3
6    绯闻    4
*/

靠，师傅就是手快，[img=http://forum.csdn.net/PointForum/ui/scripts/csdn/Plugin/003/monkey/11.gif][/img]

------解决方案--------------------
SQL code
--ClassID ClassName ClassParentID
--1 信息 0
--2 视频 0
--3 新闻频道 1
--4 情感 3
--5 家庭 4
--6 绯闻 4
--7 搞笑视频 2
--8 悲剧视频 2

create table   tb(ClassID int,ClassName nvarchar(32),ClassParentID int)
insert into tb  SELECT 1,'信息',0
UNION ALL SELECT 2,'视频',0 
UNION ALL SELECT 3,'新闻频道',1
UNION ALL SELECT 4,'情感',3
UNION ALL SELECT 5,'家庭',4
UNION ALL SELECT 6,'绯闻',4
UNION ALL SELECT 7,'搞笑视频',2
UNION ALL SELECT 8,'悲剧视频',2

;with ct as 
(
 select * from  tb where ClassID=6
 union all
 select   tb.* from  tb ,ct where ct.ClassParentID= tb.ClassID
 )
 select * from ct   order by ClassID  
 drop table tb


ClassID     ClassName                        ClassParentID
----------- -------------------------------- -------------
1           信息                               0
3           新闻频道                             1
4           情感                               3
6           绯闻                               4

(4 行受影响)

------解决方案--------------------
SQL code

/*
标题：SQL SERVER 2000中查询指定节点及其所有父节点的函数(表格形式显示)
作者：爱新觉罗·毓华(十八年风雨,守得冰山雪莲花开) 
时间：2008-05-12
地点：广东深圳
*/

create table tb(id varchar(3) , pid varchar(3) , name varchar(10))
insert into tb values('001' , null  , '广东省')
insert into tb values('002' , '001' , '广州市')
insert into tb values('003' , '001' , '深圳市')
insert into tb values('004' , '002' , '天河区')
insert into tb values('005' , '003' , '罗湖区')
insert into tb values('006' , '003' , '福田区')
insert into tb values('007' , '003' , '宝安区')
insert into tb values('008' , '007' , '西乡镇')
insert into tb values('009' , '007' , '龙华镇')
insert into tb values('010' , '007' , '松岗镇')
go

--查询指定节点及其所有父节点的函数
create function f_pid(@id varchar(3)) returns @t_level table(id varchar(3))
as
begin
  insert into @t_level select @id
  select @id = pid from tb where id = @id and pid is not null
  while @@ROWCOUNT > 0
  begin
    insert into @t_level select @id 
    select @id = pid from tb where id = @id and pid is not null
  end
  return
end
go

--调用函数查询002(广州市)及其所有父节点
select a.* from tb a , f_pid('002') b where a.id = b.id order by a.id
/*
id   pid  name       
---- ---- ---------- 
001  NULL 广东省
002  001  广州市

（所影响的行数为 2 行）
*/

--调用函数查询003(深圳市)及其所有父节点
select a.* from tb a , f_pid('003') b where a.id = b.id order by a.id
/*
id   pid  name       
---- ---- --