sql: T-SQL parent-child function script

--Parent-Child reationship
--涂聚文 2014-08-25
--得位置的子節點函數表（包含本身）
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetBookPlaceChildrenId]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[GetBookPlaceChildrenId]
GO
Create Function GetBookPlaceChildrenId
(
	@ID int
)
Returns @Tree Table (BookPlaceID Int,BookPlaceParent Int, BookPlaceName NVarchar(180))
As
Begin
Insert @Tree Select BookPlaceID,BookPlaceParent, BookPlaceName From BookPlaceList Where BookPlaceID = @ID
While @@Rowcount > 0
Insert @Tree Select A.BookPlaceID, A.BookPlaceParent, A.BookPlaceName From BookPlaceList A Inner Join @Tree B On A.BookPlaceParent = B.BookPlaceID And A.BookPlaceID Not In (Select BookPlaceID From @Tree)---
Return
End
GO

select * from dbo.GetBookPlaceChildrenId (2)

---得到位置子节点列表ID地址函數（包含本身）
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetBookPlaceGroupId]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[GetBookPlaceGroupId]
GO
Create Function [dbo].[GetBookPlaceGroupId]
(
	@BookPlaceID int
)
RETURNS NVARCHAR(200)
AS
BEGIN
declare @allstring nvarchar(200),@top nvarchar(200)--,@BookPlaceID int
--set @BookPlaceID=2
set @allstring=''
select @allstring=@allstring+cast(BookPlaceID as varchar(10))+',' FROM [dbo].[GetBookPlaceChildrenId](@BookPlaceID) ORDER BY BookPlaceID  --where CompanyID<>@CompanyID
set  @allstring=LEFT(@allstring,LEN(@allstring)-1)
--select @allstring
RETURN @allstring
END
GO

select  [dbo].[GetBookPlaceGroupId] (2)

--
--查位置所有子结点,带路径与排序
 if object_id('GetBookPlaceParentLevel') is not null
drop function GetBookPlaceParentLevel
 go
 create function GetBookPlaceParentLevel(@id int)
 returns @re table(BookPlaceID int,BookPlaceParent int,BookPlaceName nvarchar(100),[level] int,sort varchar(100),BookPlaceFullName nvarchar(500))
 as
 begin
     declare @l int
     set @l=0
     insert @re
  select BookPlaceID,BookPlaceParent,BookPlaceName,@l,right('000'+ltrim(BookPlaceID),3),BookPlaceName  from BookPlaceList where BookPlaceParent=@id
     while @@rowcount>0
     begin
         set @l=@l+1
         insert @re
   select a.BookPlaceID,a.BookPlaceParent,a.BookPlaceName,@l,b.sort+right('000'+ltrim(a.BookPlaceID),3), b.BookPlaceFullName+''+a.BookPlaceName from BookPlaceList as a,@re as b
   where b.BookPlaceID=a.BookPlaceParent and b.[level]=@l-1
     end
     update @re set [level] = [level]
     return
 end
 go  

select * from GetBookPlaceParentLevel(0)

select * from GetBookPlaceParentLevel (0) where BookPlaceID<>1

select * from GetBookPlaceParentLevel (0) where BookPlaceID<>1

select * from GetBookPlaceParentLevel (0) where BookPlaceID<>1 and [level]=1 

--測試結果
/*
2	1	第一层楼	1	001002	涂聚文图书位置目录第一层楼
3	1	第二层楼	1	001003	涂聚文图书位置目录第二层楼
4	2	第一排	2	001002004	涂聚文图书位置目录第一层楼第一排
6	2	第二排	2	001002006	涂聚文图书位置目录第一层楼第二排
7	4	第二层	3	001002004007	涂聚文图书位置目录第一层楼第一排第二层
8	4	第三层	3	001002004008	涂聚文图书位置目录第一层楼第一排第三层
5	4	第一层	3	001002004005	涂聚文图书位置目录第一层楼第一排第一层
12	4	第四层	3	001002004012	涂聚文图书位置目录第一层楼第一排第四层
9	6	第一层	3	001002006009	涂聚文图书位置目录第一层楼第二排第一层
10	6	第二层	3	001002006010	涂聚文图书位置目录第一层楼第二排第二层
11	6	第三层	3	001002006011	涂聚文图书位置目录第一层楼第二排第三层
*/

declare @id int
set @id = 3
;with t as--如果CTE前面有语句，需要用分号隔断
(
select BookKindID, BookKindParent, BookKindName
from BookKindList
where BookKindID = @id
union all
select r1.BookKindID,r1.BookKindParent,r1.BookKindName
from BookKindList r1 join t as r2 on r1.BookKindParent = r2.BookKindID
)
select * from t order by BookKindID

-- 查找所有父节点
with tab as
(
 select BookKindID,BookKindParent,BookKindName from BookKindList where BookKindID=3--子节点
 union all
 select b.BookKindID,b.BookKindParent,b.BookKindName
 from
  tab a,--子节点数据集
  BookKindList b  --父节点数据集
 where a.BookKindParent=b.BookKindID  --子节点数据集.parendID=父节点数据集.ID
)
select * from tab;

-- 查找所有子节点
with tab as
(
 select BookKindID,BookKindParent,BookKindName from BookKindList where BookKindID=3--父节点
 union all
 select b.BookKindID,b.BookKindParent,b.BookKindName
 from
  tab a,--父节点数据集
  BookKindList b--子节点数据集
 where b.BookKindParent=a.BookKindID  --子节点数据集.ID=父节点数据集.parendID
)
select * from tab;

--查找从子节点到定级节点的路径
with tab as
(
 select BookKindID,BookKindParent,BookKindName,cast(BookKindID as varchar(100)) as fulltypeid
 from BookKindList where BookKindID=3--子节点
 union all
 select
   b.BookKindID,b.BookKindParent,b.BookKindName,
   cast(a.fulltypeid+','+cast(b.BookKindID as nvarchar(100)) as varchar(100)) as fulltypeid
 from
  tab a,--子节点数据集
  BookKindList b  --父节点数据集
 where a.BookKindParent=b.BookKindID  --子节点数据集.parendID=父节点数据集.ID
)
select * from tab ;