Aaaack。
我有一个大脑冻结的时刻。
下面我有一个自引用表。 我有一个CTE自我加入并获得信息。
我想要得到的是一个人的“完整的等级路径”。
请注意，我没有预定数量的级别。 （我的下面的例子是组成的，请把这个人带到一粒盐的位置关系，它〜代表我的数据结构，它不是我真正的数据结构）
请注意@PersonUUID_Me映射到“Town”级别，而@PersonUUID_Nobody映射到街道级别。 Aka，两个不同的人有两个不同的行数。所以我不能将“深度”定为3（或任何预定的）。
我现在得到的只是Person_Me的“底部”行。
AAAAAAAA-6666-6666-6666-666666666666 Strasburg AAAAAAAA-7777-7777-7777-777777777777 3
我想得到什么：
99999999-9999-9999-9999-999999999999 USA (NULL) 0
AAAAAAAA-8888-8888-8888-888888888888 Virginia 99999999-9999-9999-9999-999999999999 1
AAAAAAAA-7777-7777-7777-777777777777 Shenandoah AAAAAAAA-8888-8888-8888-888888888888 2
AAAAAAAA-6666-6666-6666-666666666666 Strasburg AAAAAAAA-7777-7777-7777-777777777777 3
和（未显示），如果我为Person_Nobody运行它，我会得到：
99999999-9999-9999-9999-999999999999 USA (NULL) 0
BBBBBBBB-8888-8888-8888-888888888888 North Carolina 99999999-9999-9999-9999-999999999999 1
BBBBBBBB-7777-7777-7777-777777777777 Wake BBBBBBBB-8888-8888-8888-888888888888 2
BBBBBBBB-6666-6666-6666-666666666666 Raleigh BBBBBBBB-7777-7777-7777-777777777777 3
BBBBBBBB-5555-5555-5555-555555555555 Main St BBBBBBBB-6666-6666-6666-666666666666 4
Gaaaa。我知道，我遗漏了一些基本的东西，但我脑子里都冻结了。
同样，我正在尝试为一个人获取完整的层次结构跟踪，该人被映射到“最底层”的层次结构元素.....但该元素的“深度”不是预先决心。在这个例子中，它将是“我将映射我最了解的层次结构值，但我可能不知道最详细的信息（街道），我可能只知道你的州或城镇..
-- START TSQL
SET NOCOUNT ON
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[Person]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
BEGIN
DROP TABLE [dbo].[Person]
END
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[BreadCrumbTrail]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
BEGIN
DROP TABLE [dbo].[BreadCrumbTrail]
END
GO
CREATE TABLE [dbo].[BreadCrumbTrail] (
[BreadCrumbTrailSurrogateUUID] [uniqueidentifier] NOT NULL
, [BreadCrumbTrailName] varchar(64) NOT NULL
, [CreateDate] [datetime] NOT NULL
, ParentBreadCrumbTrailSurrogateUUID [uniqueidentifier] NULL
)
GO
ALTER TABLE dbo.BreadCrumbTrail ADD CONSTRAINT PK_BreadCrumbTrail PRIMARY KEY NONCLUSTERED (BreadCrumbTrailSurrogateUUID)
GO
ALTER TABLE [dbo].[BreadCrumbTrail] ADD CONSTRAINT FK_BreadCrumbTrail_SelfRef FOREIGN KEY ([ParentBreadCrumbTrailSurrogateUUID]) REFERENCES dbo.[BreadCrumbTrail] (BreadCrumbTrailSurrogateUUID)
GO
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[Person]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
BEGIN
DROP TABLE [dbo].[Person]
END
CREATE TABLE [dbo].[Person] (
[PersonUUID] [uniqueidentifier] NOT NULL,
[BreadCrumbTrailSurrogateUUID] [uniqueidentifier] NOT NULL,
[LastName] [varchar](64) NOT NULL,
[FirstName] [varchar](64) NOT NULL,
[CreateDate] [datetime] NOT NULL
)
GO
ALTER TABLE dbo.Person ADD CONSTRAINT PK_Person PRIMARY KEY NONCLUSTERED (PersonUUID)
GO
ALTER TABLE [dbo].Person ADD CONSTRAINT FK_Person_To_BreadCrumb FOREIGN KEY ([BreadCrumbTrailSurrogateUUID]) REFERENCES dbo.[BreadCrumbTrail] (BreadCrumbTrailSurrogateUUID)
GO
declare @PersonUUID_Me [uniqueidentifier]
select @PersonUUID_Me = '11111111-1111-1111-1111-111111111111'
declare @PersonUUID_Nobody [uniqueidentifier]
select @PersonUUID_Nobody = '22222222-2222-2222-2222-222222222222'
declare @BreadCrumbTrailSurrogateUUID_Country [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_Country = '99999999-9999-9999-9999-999999999999'
declare @BreadCrumbTrailSurrogateUUID_State1 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_State1 = 'AAAAAAAA-8888-8888-8888-888888888888'
declare @BreadCrumbTrailSurrogateUUID_County1 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_County1 = 'AAAAAAAA-7777-7777-7777-777777777777'
declare @BreadCrumbTrailSurrogateUUID_Town1 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_Town1 = 'AAAAAAAA-6666-6666-6666-666666666666'
declare @BreadCrumbTrailSurrogateUUID_State2 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_State2 = 'BBBBBBBB-8888-8888-8888-888888888888'
declare @BreadCrumbTrailSurrogateUUID_County2 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_County2 = 'BBBBBBBB-7777-7777-7777-777777777777'
declare @BreadCrumbTrailSurrogateUUID_Town2 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_Town2 = 'BBBBBBBB-6666-6666-6666-666666666666'
declare @BreadCrumbTrailSurrogateUUID_Street2 [uniqueidentifier]
select @BreadCrumbTrailSurrogateUUID_Street2 = 'BBBBBBBB-5555-5555-5555-555555555555'
INSERT INTO [dbo].[BreadCrumbTrail] (
[BreadCrumbTrailSurrogateUUID]
, [BreadCrumbTrailName]
, [CreateDate]
, ParentBreadCrumbTrailSurrogateUUID
)
Select @BreadCrumbTrailSurrogateUUID_Country , 'USA' , CURRENT_TIMESTAMP , NULL
UNION ALL Select @BreadCrumbTrailSurrogateUUID_State1 , 'Virginia' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_Country
UNION ALL Select @BreadCrumbTrailSurrogateUUID_County1 , 'Shenandoah' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_State1
UNION ALL Select @BreadCrumbTrailSurrogateUUID_Town1, 'Strasburg' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_County1
UNION ALL Select @BreadCrumbTrailSurrogateUUID_State2 , 'North Carolina' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_Country
UNION ALL Select @BreadCrumbTrailSurrogateUUID_County2 , 'Wake' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_State2
UNION ALL Select @BreadCrumbTrailSurrogateUUID_Town2, 'Raleigh' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_County2
UNION ALL Select @BreadCrumbTrailSurrogateUUID_Street2, 'Main St' , CURRENT_TIMESTAMP , @BreadCrumbTrailSurrogateUUID_Town2
INSERT INTO [dbo].[Person] ( [PersonUUID] , [BreadCrumbTrailSurrogateUUID] , [LastName] , [FirstName] , [CreateDate] )
Select @PersonUUID_Me , @BreadCrumbTrailSurrogateUUID_Town1 , 'Coder', 'Granada' , CURRENT_TIMESTAMP
UNION ALL Select @PersonUUID_Nobody , @BreadCrumbTrailSurrogateUUID_Street2 , 'Body', 'No' , CURRENT_TIMESTAMP
/*
Select [PersonUUID] , [BreadCrumbTrailSurrogateUUID] , [LastName] , [FirstName] , [CreateDate]
from [dbo].[Person] per
where per.PersonUUID = @PersonUUID_Me
*/
;WITH cteLocation (BreadCrumbTrailSurrogateUUID, [BreadCrumbTrailName] , ParentBreadCrumbTrailSurrogateUUID , Depth)
AS
(
Select bc1.BreadCrumbTrailSurrogateUUID, bc1.[BreadCrumbTrailName], bc1.ParentBreadCrumbTrailSurrogateUUID , 0 as Depth From dbo.BreadCrumbTrail bc1 where bc1.ParentBreadCrumbTrailSurrogateUUID IS NULL
Union ALL
Select bc2.BreadCrumbTrailSurrogateUUID, bc2.[BreadCrumbTrailName] , bc2.ParentBreadCrumbTrailSurrogateUUID , Depth + 1
From dbo.BreadCrumbTrail bc2
inner join cteLocation cteL on bc2.ParentBreadCrumbTrailSurrogateUUID = cteL.BreadCrumbTrailSurrogateUUID
)
Select cteLoc.BreadCrumbTrailSurrogateUUID, [BreadCrumbTrailName] , ParentBreadCrumbTrailSurrogateUUID , Depth
from cteLocation cteLoc
join [dbo].[Person] per on per.BreadCrumbTrailSurrogateUUID = cteLoc.BreadCrumbTrailSurrogateUUID
where per.PersonUUID = @PersonUUID_Me
答案 0 :(得分：1)
您需要另一个CTE从层次结构中的人员回溯：
;WITH cteLocation (BreadCrumbTrailSurrogateUUID, [BreadCrumbTrailName] , ParentBreadCrumbTrailSurrogateUUID , Depth)
AS
(
Select bc1.BreadCrumbTrailSurrogateUUID, bc1.[BreadCrumbTrailName], bc1.ParentBreadCrumbTrailSurrogateUUID , 0 as Depth From dbo.BreadCrumbTrail bc1 where bc1.ParentBreadCrumbTrailSurrogateUUID IS NULL
Union ALL
Select bc2.BreadCrumbTrailSurrogateUUID, bc2.[BreadCrumbTrailName] , bc2.ParentBreadCrumbTrailSurrogateUUID , Depth + 1
From dbo.BreadCrumbTrail bc2
inner join cteLocation cteL on bc2.ParentBreadCrumbTrailSurrogateUUID = cteL.BreadCrumbTrailSurrogateUUID
)
,ctePerson as
(
Select cteLoc.BreadCrumbTrailSurrogateUUID, [BreadCrumbTrailName] , ParentBreadCrumbTrailSurrogateUUID , Depth
from cteLocation cteLoc
join [dbo].[Person] per on per.BreadCrumbTrailSurrogateUUID = cteLoc.BreadCrumbTrailSurrogateUUID
where per.PersonUUID = @PersonUUID_Nobody
union all
Select c.BreadCrumbTrailSurrogateUUID, c.[BreadCrumbTrailName], c.ParentBreadCrumbTrailSurrogateUUID, c.Depth
from cteLocation c
inner join ctePerson p on c.BreadCrumbTrailSurrogateUUID = p.ParentBreadCrumbTrailSurrogateUUID
)
select *
from ctePerson
order by Depth