请问如何查询下表中的页节点的路径(不是页节点不列出)谢谢了:
例如:表结构id c_name pid
------------------------------
1 aaa 0
2 bbb 1
3 ccc 1
4 ddd 1
5 eee 2
6 fff 2
7 ggg 5
8 eee 3查询结果id c_name url
------------------------------
4 ddd aaa-->ddd
6 fff aaa-->bbb-->fff
7 ggg aaa-->bbb-->eee-->ggg
8 eee aaa-->ccc-->eee
例如:表结构id c_name pid
------------------------------
1 aaa 0
2 bbb 1
3 ccc 1
4 ddd 1
5 eee 2
6 fff 2
7 ggg 5
8 eee 3查询结果id c_name url
------------------------------
4 ddd aaa-->ddd
6 fff aaa-->bbb-->fff
7 ggg aaa-->bbb-->eee-->ggg
8 eee aaa-->ccc-->eee
/*
标题:SQL SERVER 2000中查询指定节点及其所有父节点的函数(字符串形式显示)
作者:爱新觉罗·毓华(十八年风雨,守得冰山雪莲花开)
时间:2010-02-02
地点:新疆乌鲁木齐
*/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--查询各节点的父路径函数(从父到子)
create function f_pid1(@id varchar(3)) returns varchar(100)
as
begin
declare @re_str as varchar(100)
set @re_str = ''
select @re_str = name from tb where id = @id
while exists (select 1 from tb where id = @id and pid is not null)
begin
select @id = b.id , @re_str = b.name + ',' + @re_str from tb a , tb b where a.id = @id and a.pid = b.id
end
return @re_str
end
go
--查询各节点的父路径函数(从子到父)
create function f_pid2(@id varchar(3)) returns varchar(100)
as
begin
declare @re_str as varchar(100)
set @re_str = ''
select @re_str = name from tb where id = @id
while exists (select 1 from tb where id = @id and pid is not null)
begin
select @id = b.id , @re_str = @re_str + ',' + b.name from tb a , tb b where a.id = @id and a.pid = b.id
end
return @re_str
end
goselect * ,
dbo.f_pid1(id) [路径(从父到子)] ,
dbo.f_pid2(id) [路径(从子到父)]
from tb order by iddrop function f_pid1 , f_pid2
drop table tb/*
id pid name 路径(从父到子) 路径(从子到父)
---- ---- ------ --------------------------- ----------------------------
001 NULL 广东省 广东省 广东省
002 001 广州市 广东省,广州市 广州市,广东省
003 001 深圳市 广东省,深圳市 深圳市,广东省
004 002 天河区 广东省,广州市,天河区 天河区,广州市,广东省
005 003 罗湖区 广东省,深圳市,罗湖区 罗湖区,深圳市,广东省
006 003 福田区 广东省,深圳市,福田区 福田区,深圳市,广东省
007 003 宝安区 广东省,深圳市,宝安区 宝安区,深圳市,广东省
008 007 西乡镇 广东省,深圳市,宝安区,西乡镇 西乡镇,宝安区,深圳市,广东省
009 007 龙华镇 广东省,深圳市,宝安区,龙华镇 龙华镇,宝安区,深圳市,广东省
010 007 松岗镇 广东省,深圳市,宝安区,松岗镇 松岗镇,宝安区,深圳市,广东省(所影响的行数为 10 行)
*/
go
if not object_id(N'Tempdb..#T') is null
drop table #T
Go
Create table #T([id] int,[c_name] nvarchar(3),[pid] int)
Insert #T
select 1,N'aaa',0 union all
select 2,N'bbb',1 union all
select 3,N'ccc',1 union all
select 4,N'ddd',1 union all
select 5,N'eee',2 union all
select 6,N'fff',2 union all
select 7,N'ggg',5 union all
select 8,N'eee',3
Go
;WITH a
AS
(
Select *,url=CAST([c_name] AS NVARCHAR(200)) from #T AS a WHERE NOT EXISTS(SELECT 1 FROM #T WHERE a.[pid]=[id])
UNION ALL
SELECT b.*,CAST( a.url+'-->'+b.[c_name] AS NVARCHAR(200)) FROM a INNER JOIN #T AS b ON a.ID=b.[pid]
)
SELECT * FROM a WHERE NOT EXISTS(SELECT 1 FROM #t WHERE Pid=a.ID) ORDER BY 1/*
id c_name pid url
4 ddd 1 aaa-->ddd
6 fff 2 aaa-->bbb-->fff
7 ggg 5 aaa-->bbb-->eee-->ggg
8 eee 3 aaa-->ccc-->eee
*/
--> 生成测试数据表:tb
IF NOT OBJECT_ID('[tb]') IS NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb](GUID INT IDENTITY,[col1] NVARCHAR(10),[col2] NVARCHAR(20))
INSERT [tb]
SELECT N'A','01' UNION ALL
SELECT N'B','01.01' UNION ALL
SELECT N'C','01.01.01' UNION ALL
SELECT N'F','01.01.01.01' UNION ALL
SELECT N'E','01.01.01.02' UNION ALL
SELECT N'D','01.01.01.03' UNION ALL
SELECT N'O','02' UNION ALL
SELECT N'P','02.01' UNION ALL
SELECT N'Q','02.01.01'
GO
--SELECT * FROM [tb]-->SQL查询如下:---另一种方法
;WITH T AS
(
SELECT *,PATH=CAST([COL1] AS VARCHAR(1000)) FROM TB A
WHERE NOT EXISTS(
SELECT 1 FROM TB
WHERE A.COL2 LIKE COL2+'%'
AND LEN(A.COL2)>LEN(COL2))
UNION ALL
SELECT A.*,CAST(PATH+'-->'+A.COL1 AS VARCHAR(1000))
FROM TB A
JOIN T B
ON A.COL2 LIKE B.COL2+'%' AND LEN(A.COL2)-3=LEN(B.COL2)
)SELECT * FROM T ORDER BY LEFT(COL2,2)/*GUID COL1 COL2 PATH----------- ---------- -------------------- --------------------1 A 01 A2 B 01.01 A-->B3 C 01.01.01 A-->B-->C4 F 01.01.01.01 A-->B-->C-->F5 E 01.01.01.02 A-->B-->C-->E6 D 01.01.01.03 A-->B-->C-->D7 O 02 O8 P 02.01 O-->P9 Q 02.01.01 O-->P-->Q
(9 行受影响)*/
;WITH T AS(
SELECT *,CAST(COL1 AS VARCHAR(1000)) AS PATH
FROM TB
WHERE COL2 NOT LIKE '%.%'
UNION ALL
SELECT A.*,CAST(B.PATH+'-->'+A.COL1 AS VARCHAR(1000))
FROM TB A,T B
WHERE A.COL2 LIKE B.COL2+'.[01-99][01-99]'
)SELECT * FROM T
ORDER BY LEFT(COL2,2)/*GUID COL1 COL2 PATH----------- ---------- -------------------- --------------------1 A 01 A2 B 01.01 A-->B3 C 01.01.01 A-->B-->C4 F 01.01.01.01 A-->B-->C-->F5 E 01.01.01.02 A-->B-->C-->E6 D 01.01.01.03 A-->B-->C-->D7 O 02 O8 P 02.01 O-->P9 Q 02.01.01 O-->P-->Q (9 行受影响)*/
insert into tb select 1,'aaa',0
insert into tb select 2,'bbb',1
insert into tb select 3,'ccc',1
insert into tb select 4,'ddd',1
insert into tb select 5,'eee',2
insert into tb select 6,'fff',2
insert into tb select 7,'ggg',5
insert into tb select 8,'eee',3
go
;with cte as(
select *,id as id1,convert(varchar(30),c_name)as url from tb a where not exists(select 1 from tb where pid=a.id)
union all
select b.*,a.id1,convert(varchar(30),b.c_name+'-->'+a.url) from cte a inner join tb b on a.pid=b.id
)select id1 as id,c_name,url from cte a where not exists(select 1 from cte where id1=a.id1 and url<a.url)
/*
id c_name url
----------- ---------- ------------------------------
8 aaa aaa-->ccc-->eee
7 aaa aaa-->bbb-->eee-->ggg
6 aaa aaa-->bbb-->fff
4 aaa aaa-->ddd(4 行受影响)*/
go
drop table tb
AS
(
Select *,url=CAST([c_name] AS NVARCHAR(200)) from #T AS a WHERE [pid]=0
UNION ALL
SELECT b.*,CAST( a.url+'-->'+b.[c_name] AS NVARCHAR(200)) FROM a INNER JOIN #T AS b ON a.ID=b.[pid]
)
SELECT * FROM a WHERE NOT EXISTS(SELECT 1 FROM #t WHERE Pid=a.ID) ORDER BY 1
use Tempdb
go
if not object_id(N'Tempdb..#T') is null
drop table #T
Go
Create table #T([id] int,[c_name] nvarchar(10),[pid] int)
Insert #T
select 1,N'aaa',0 union all
select 2,N'bbb',1 union all
select 3,N'ccc',1 union all
select 4,N'ddd',1 union all
select 5,N'eee',2 union all
select 6,N'fff',2 union all
select 7,N'ggg',5 union all
select 8,N'eee',3
Go
IF OBJECT_ID('Tempdb..#') IS NOT NULL
DROP TABLE #
DECLARE @lev INT
SET @lev=0
Select *,url=CAST([c_name] AS NVARCHAR(1000))INTO # from #T AS a WHERE Pid=0
WHILE @@ROWCOUNT>0
BEGIN
SET @lev=@lev+1
INSERT #
SELECT b.*,CAST( a.url+'-->'+b.[c_name] AS NVARCHAR(200)) FROM # AS a INNER JOIN #T AS b ON a.ID=b.[pid] WHERE a.Pid=@lev-1
endSELECT * FROM # AS a WHERE NOT EXISTS(SELECT 1 FROM #t WHERE Pid=a.ID) ORDER BY 1/*
id c_name pid url
4 ddd 1 aaa-->ddd
6 fff 2 aaa-->bbb-->fff
7 ggg 5 aaa-->bbb-->eee-->ggg
8 eee 3 aaa-->ccc-->eee
*/