create function f_dw_parent(@id varchar(50)) returns varchar(100)
as
begin
DECLARE @t_level table(dw_h varchar(50),Level int)
DECLARE @Level int
SET @Level=1
insert into @t_level select @id,@Level
select @id = parent_dw_h from dw where dw_h = @id and parent_dw_h is not null
while @@ROWCOUNT > 50
begin
SET @Level=@Level+1
INSERT @t_Level SELECT a.parent_dw_h,@Level
FROM dw a,@t_Level b
WHERE a.dw_h=b.dw_h and b.Level=@Level-1
end
return @id
end目前只能返回父节点 ,怎样根据Level 返回父父节点呢?
as
begin
DECLARE @t_level table(dw_h varchar(50),Level int)
DECLARE @Level int
SET @Level=1
insert into @t_level select @id,@Level
select @id = parent_dw_h from dw where dw_h = @id and parent_dw_h is not null
while @@ROWCOUNT > 50
begin
SET @Level=@Level+1
INSERT @t_Level SELECT a.parent_dw_h,@Level
FROM dw a,@t_Level b
WHERE a.dw_h=b.dw_h and b.Level=@Level-1
end
return @id
end目前只能返回父节点 ,怎样根据Level 返回父父节点呢?
-->Author:wufeng4552
-->Date :2009-09-30 08:52:38
set nocount on
if object_id('tb','U')is not null drop table tb
go
create table tb(ID int, ParentID int)
insert into tb select 1,0
insert into tb select 2,1
insert into tb select 3,1
insert into tb select 4,2
insert into tb select 5,3
insert into tb select 6,5
insert into tb select 7,6
-->Title:查找指定節點下的子結點
if object_id('Uf_GetChildID')is not null drop function Uf_GetChildID
go
create function Uf_GetChildID(@ParentID int)
returns @t table(ID int)
as
begin
insert @t select ID from tb where ParentID=@ParentID
while @@rowcount<>0
begin
insert @t select a.ID from tb a inner join @t b
on a.ParentID=b.id and
not exists(select 1 from @t where id=a.id)
end
return
end
go
select * from dbo.Uf_GetChildID(5)
/*
ID
-----------
6
7
*/
-->Title:查找指定節點的所有父結點
if object_id('Uf_GetParentID')is not null drop function Uf_GetParentID
go
create function Uf_GetParentID(@ID int)
returns @t table(ParentID int)
as
begin
insert @t select ParentID from tb where ID=@ID
while @@rowcount!=0
begin
insert @t select a.ParentID from tb a inner join @t b
on a.id=b.ParentID and
not exists(select 1 from @t where ParentID=a.ParentID)
end
return
end
go
select * from dbo.Uf_GetParentID(2)
/*
ParentID
-----------
1
0
*/
查询指定节点及其父节点
IF OBJECT_ID('tb') IS NOT NULL DROP TABLE tb
GO
CREATE TABLE tb(id VARCHAR(3),pid VARCHAR(3),[name] VARCHAR(10))
GO
INSERT INTO tb SELECT '001',NULL,'河南省'
UNION ALL SELECT '002','001','洛阳市'
UNION ALL SELECT '003','001','新乡市'
UNION ALL SELECT '004','002','栾川县'
UNION ALL SELECT '005','003','长垣县'
UNION ALL SELECT '006','002','孟津县'
UNION ALL SELECT '007','004','冷水乡'
UNION ALL SELECT '008','004','叫河乡'
UNION ALL SELECT '009','008','A村'
UNION ALL SELECT '010','008','B村'
GO/*
2、查询指定节点及其所有父节点
如:已知 栾川县
得到以下结果
id pid name
---- ---- ----------
001 NULL 河南省
002 001 洛阳市
004 002 栾川县
*/
----------------------测试开始-------------------------------------------------
DECLARE @s VARCHAR(10)
SET @s='栾川县'
SELECT id, pid,[name] INTO # FROM tb WHERE [name]=@s
WHILE @@ROWCOUNT>0
BEGIN
INSERT INTO # SELECT t.id, t.pid,t.[name] FROM tb AS t
INNER JOIN # AS a ON t.id=a.pid AND t.id NOT IN(SELECT ID FROM #)
END
SELECT * FROM # ORDER BY ID
-----------------------测试结束-------------------------------------------------
/*
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
---- ---- ----------
001 NULL 广东省
003 001 深圳市(所影响的行数为 2 行)
*/--调用函数查询008(西乡镇)及其所有父节点
select a.* from tb a , f_pid('008') b where a.id = b.id order by a.id
/*
id pid name
---- ---- ----------
001 NULL 广东省
003 001 深圳市
007 003 宝安区
008 007 西乡镇(所影响的行数为 4 行)
*/drop table tb
drop function f_pid@@ROWCOUNT:返回受上一语句影响的行数。
返回类型:integer。
注释:任何不返回行的语句将这一变量设置为 0 ,如 IF 语句。
示例:下面的示例执行 UPDATE 语句并用 @@ROWCOUNT 来检测是否有发生更改的行。UPDATE authors SET au_lname = 'Jones' WHERE au_id = '999-888-7777'
IF @@ROWCOUNT = 0
print 'Warning: No rows were updated'结果:(所影响的行数为 0 行)
Warning: No rows were updated
/*
标题:SQL SERVER 2005中查询指定节点及其所有父节点的方法(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:2010-02-02
地点:新疆乌鲁木齐
*/create table tb(id varchar(3) , pid varchar(3) , name nvarchar(10))
insert into tb values('001' , null , N'广东省')
insert into tb values('002' , '001' , N'广州市')
insert into tb values('003' , '001' , N'深圳市')
insert into tb values('004' , '002' , N'天河区')
insert into tb values('005' , '003' , N'罗湖区')
insert into tb values('006' , '003' , N'福田区')
insert into tb values('007' , '003' , N'宝安区')
insert into tb values('008' , '007' , N'西乡镇')
insert into tb values('009' , '007' , N'龙华镇')
insert into tb values('010' , '007' , N'松岗镇')
goDECLARE @ID VARCHAR(3)--查询ID = '001'的所有父节点
SET @ID = '001'
;WITH T AS
(
SELECT ID , PID , NAME
FROM TB
WHERE ID = @ID
UNION ALL
SELECT A.ID , A.PID , A.NAME
FROM TB AS A JOIN T AS B ON A.ID = B.PID
)
SELECT * FROM T ORDER BY ID
/*
ID PID NAME
---- ---- ----------
001 NULL 广东省(1 行受影响)
*/--查询ID = '002'的所有父节点
SET @ID = '002'
;WITH T AS
(
SELECT ID , PID , NAME
FROM TB
WHERE ID = @ID
UNION ALL
SELECT A.ID , A.PID , A.NAME
FROM TB AS A JOIN T AS B ON A.ID = B.PID
)
SELECT * FROM T ORDER BY ID
/*
ID PID NAME
---- ---- ----------
001 NULL 广东省
002 001 广州市(2 行受影响)
*/--查询ID = '003'的所有父节点
SET @ID = '003'
;WITH T AS
(
SELECT ID , PID , NAME
FROM TB
WHERE ID = @ID
UNION ALL
SELECT A.ID , A.PID , A.NAME
FROM TB AS A JOIN T AS B ON A.ID = B.PID
)
SELECT * FROM T ORDER BY ID
/*
ID PID NAME
---- ---- ----------
001 NULL 广东省
003 001 深圳市(2 行受影响)
*/--查询ID = '009'的所有父节点
SET @ID = '009'
;WITH T AS
(
SELECT ID , PID , NAME
FROM TB
WHERE ID = @ID
UNION ALL
SELECT A.ID , A.PID , A.NAME
FROM TB AS A JOIN T AS B ON A.ID = B.PID
)
SELECT * FROM T ORDER BY ID
/*
ID PID NAME
---- ---- ----------
001 NULL 广东省
003 001 深圳市
007 003 宝安区
009 007 龙华镇(4 行受影响)
*/drop table tb--注:除ID值不一样外,四个SQL语句是一样的。
我想获取 009 父父节点,就是004 栾川县,而不是'008' ,'叫河乡'
INSERT INTO tb SELECT '001',NULL,'河南省'
UNION ALL SELECT '002','001','洛阳市'
UNION ALL SELECT '003','001','新乡市'
UNION ALL SELECT '004','002','栾川县'
UNION ALL SELECT '005','003','长垣县'
UNION ALL SELECT '006','002','孟津县'
UNION ALL SELECT '007','004','冷水乡'
UNION ALL SELECT '008','004','叫河乡'
UNION ALL SELECT '009','008','A村'
UNION ALL SELECT '010','008','B村'
GO
我想获取 009 父父节点,就是004 栾川县,而不是'008' ,'叫河乡'
INSERT INTO tb SELECT '001',NULL,'河南省'
UNION ALL SELECT '002','001','洛阳市'
UNION ALL SELECT '003','001','新乡市'
UNION ALL SELECT '004','002','栾川县'
UNION ALL SELECT '005','003','长垣县'
UNION ALL SELECT '006','002','孟津县'
UNION ALL SELECT '007','004','冷水乡'
UNION ALL SELECT '008','004','叫河乡'
UNION ALL SELECT '009','008','A村'
UNION ALL SELECT '010','008','B村'
GO
GO
CREATE TABLE tb(id VARCHAR(3),pid VARCHAR(3),[name] VARCHAR(10))
GO
INSERT INTO tb SELECT '001',NULL,'河南省'
UNION ALL SELECT '002','001','洛阳市'
UNION ALL SELECT '003','001','新乡市'
UNION ALL SELECT '004','002','栾川县'
UNION ALL SELECT '005','003','长垣县'
UNION ALL SELECT '006','002','孟津县'
UNION ALL SELECT '007','004','冷水乡'
UNION ALL SELECT '008','004','叫河乡'
UNION ALL SELECT '009','008','A村'
UNION ALL SELECT '010','008','B村'
GO
alter function f_dw_parent(@id varchar(50),@level int) returns varchar(100)
as
begin
while @level > 0
begin
select @id = pid from tb where id = @id
set @level=@level -1
end
return @id
endselect dbo.f_dw_parent ('010',1)
select dbo.f_dw_parent ('010',2)
select dbo.f_dw_parent ('010',3)
select dbo.f_dw_parent ('010',4)
select dbo.f_dw_parent ('010',5)
----------------------------------------------------------------------------------------------------
008(所影响的行数为 1 行)
----------------------------------------------------------------------------------------------------
004(所影响的行数为 1 行)
----------------------------------------------------------------------------------------------------
002(所影响的行数为 1 行)
----------------------------------------------------------------------------------------------------
001(所影响的行数为 1 行)
----------------------------------------------------------------------------------------------------
NULL(所影响的行数为 1 行)
create function f_dw_parent(@id varchar(50),@level int) returns varchar(100)
as
begin
while @level > 0
begin
select @id = parent_dw_h from dw where dw_h = @id
set @level=@level -1
end
return @id
end加个参数表示找第几父节点
create function f_dw_parent_level2(@id varchar(50),@level int) returns varchar(100)
as
begin
Declare @temp varchar(50)
if @level <0
return ''
while @level > 0
begin
select @temp = parent_dw_h from dw where dw_h = @id
if @temp is null
return ''
set @level=@level -1
end
return @id
end