CTE 查询不打印正确的结构？
我有这张代表层次结构的表格：
childID parentID NAME siblingOrder
1 1 a 0
212 1 ab 1
112 1 ac 2
412 1 ad 3
-912 112 aca 0
结构是：
a
+----ab
+----ac
+---aca
+----ad
（该siblingOrder列用于控制ab, ac,的顺序ad ）
我已经有了这个解决方案，它使用 siblingOrder：
;WITH CTE AS(
SELECT childID, parentID, 0 AS depth, NAME , siblingOrder,
CAST(RIGHT('00000' + CAST(siblingOrder AS VARCHAR(6)), 6) AS VARCHAR(1024)) AS PATH
FROM @myTable
WHERE childID = parentID
UNION ALL
SELECT TBL.childID, TBL.parentID,
CTE.depth + 1 , TBL.name ,TBL.siblingOrder,
CAST(cte.Path + '.' + RIGHT('00000' + CAST(Tbl.siblingOrder AS VARCHAR(6)), 6)AS VARCHAR(1024) )
FROM @myTable AS TBL
INNER JOIN CTE ON TBL.parentID = CTE.childID
WHERE TBL.childID<>TBL.parentID
)
SELECT path,depth, childID, parentID, siblingOrder, REPLICATE('----', depth) + name
FROM CTE
ORDER BY PATH
所以order by PATH实际做的工作：
问题：
问题是我必须（！）将值放入其中siblingOrder以使其工作！
否则，例如：
如果我把0所有siblingOrder这些都放进去，结果是：
（是的，现在按路径排序 - 不起作用......）
我需要它aca永远在ac
（我添加的唯一原因siblingOrder是订购兄弟姐妹！）并且我不想siblingOrder在不需要时强制添加
题 ：
是否可以增强查询，以便siblingOrder仅影响兄弟姐妹？
我的意思是，如果我不关心兄弟姐妹的顺序（通过放置0），我仍然希望aca在ac
您需要在路径中包含parentID和childID。所以代替
RIGHT('00000' + CAST(Tbl.siblingOrder AS VARCHAR(6)), 6)
你应该写
RIGHT('0000000000' + CAST(Tbl.parentID AS VARCHAR(10)), 10) + RIGHT('00000' + CAST(Tbl.siblingOrder AS VARCHAR(6)), 6) + RIGHT('0000000000' + CAST(Tbl.childID AS VARCHAR(10)), 10)
（那是在你的代码中的两个地方）
使用这种方式，您可以在需要的地方提供siblingOrder。如果存在，它将覆盖子订单。如果不存在，则将通过其 childID 对孩子进行排序。
没有兄弟订单的SQL 小提琴
MS SQL Server 2008 架构设置：
CREATE TABLE dbo.MyTable
([childID] int, [parentID] int, [NAME] varchar(3), [siblingOrder] int)
;
INSERT INTO dbo.MyTable
([childID], [parentID], [NAME], [siblingOrder])
VALUES
(1, 1, 'a', 0),
(212, 1, 'ab', 0),
(112, 1, 'ac', 0),
(412, 1, 'ad', 0),
(-912, 112, 'aca', 0)
;
查询 1：
;WITH CTE AS(
SELECT childID, parentID, 0 AS depth, NAME , siblingOrder,
CAST(RIGHT('0000000000' + CAST(parentID AS VARCHAR(10)), 10) + RIGHT('00000' + CAST(siblingOrder AS VARCHAR(6)), 6)+ RIGHT('0000000000' + CAST(childID AS VARCHAR(10)), 10) AS VARCHAR(1024)) AS PATH
FROM dbo.MyTable
WHERE childID = parentID
UNION ALL
SELECT TBL.childID, TBL.parentID,
CTE.depth + 1 , TBL.name ,TBL.siblingOrder,
CAST(cte.Path + '.' + RIGHT('0000000000' + CAST(Tbl.parentID AS VARCHAR(10)), 10) + RIGHT('00000' + CAST(Tbl.siblingOrder AS VARCHAR(6)), 6)+ RIGHT('0000000000' + CAST(Tbl.childID AS VARCHAR(10)), 10) AS VARCHAR(1024) )
FROM dbo.MyTable AS TBL
INNER JOIN CTE ON TBL.parentID = CTE.childID
WHERE TBL.childID<>TBL.parentID
)
SELECT path,depth, childID, parentID, siblingOrder, REPLICATE('----', depth) + name
FROM CTE
ORDER BY PATH
结果：
| PATH | DEPTH | CHILDID | PARENTID | SIBLINGORDER | COLUMN_5 |
----------------------------------------------------------------------------------------------------------------------------------------------
| 00000000010000000000000001 | 0 | 1 | 1 | 0 | a |
| 00000000010000000000000001.00000000010000000000000112 | 1 | 112 | 1 | 0 | ----ac |
| 00000000010000000000000001.00000000010000000000000112.0000000112000000000000-912 | 2 | -912 | 112 | 0 | --------aca |
| 00000000010000000000000001.00000000010000000000000212 | 1 | 212 | 1 | 0 | ----ab |
| 00000000010000000000000001.00000000010000000000000412 | 1 | 412 | 1 | 0 | ----ad |
SQL Fiddle与siblingOrder
MS SQL Server 2008 架构设置：
CREATE TABLE dbo.MyTable
([childID] int, [parentID] int, [NAME] varchar(3), [siblingOrder] int)
;
INSERT INTO dbo.MyTable
([childID], [parentID], [NAME], [siblingOrder])
VALUES
(1, 1, 'a', 0),
(212, 1, 'ab', 1),
(112, 1, 'ac', 3),
(412, 1, 'ad', 2),
(-912, 112, 'aca', 0)
;
查询 1：
;WITH CTE AS(
SELECT childID, parentID, 0 AS depth, NAME , siblingOrder,
CAST(RIGHT('0000000000' + CAST(parentID AS VARCHAR(10)), 10) + RIGHT('00000' + CAST(siblingOrder AS VARCHAR(6)), 6)+ RIGHT('0000000000' + CAST(childID AS VARCHAR(10)), 10) AS VARCHAR(1024)) AS PATH
FROM dbo.MyTable
WHERE childID = parentID
UNION ALL
SELECT TBL.childID, TBL.parentID,
CTE.depth + 1 , TBL.name ,TBL.siblingOrder,
CAST(cte.Path + '.' + RIGHT('0000000000' + CAST(Tbl.parentID AS VARCHAR(10)), 10) + RIGHT('00000' + CAST(Tbl.siblingOrder AS VARCHAR(6)), 6)+ RIGHT('0000000000' + CAST(Tbl.childID AS VARCHAR(10)), 10) AS VARCHAR(1024) )
FROM dbo.MyTable AS TBL
INNER JOIN CTE ON TBL.parentID = CTE.childID
WHERE TBL.childID<>TBL.parentID
)
SELECT path,depth, childID, parentID, siblingOrder, REPLICATE('----', depth) + name
FROM CTE
ORDER BY PATH
结果：
| PATH | DEPTH | CHILDID | PARENTID | SIBLINGORDER | COLUMN_5 |
----------------------------------------------------------------------------------------------------------------------------------------------
| 00000000010000000000000001 | 0 | 1 | 1 | 0 | a |
| 00000000010000000000000001.00000000010000010000000212 | 1 | 212 | 1 | 1 | ----ab |
| 00000000010000000000000001.00000000010000020000000412 | 1 | 412 | 1 | 2 | ----ad |
| 00000000010000000000000001.00000000010000030000000112 | 1 | 112 | 1 | 3 | ----ac |
| 00000000010000000000000001.00000000010000030000000112.0000000112000000000000-912 | 2 | -912 | 112 | 0 | --------aca |