我正在使用CTE来管理我的层次结构数据。以下是我的选择查询
WITH ctLevel
AS
(
SELECT
C_TASK_ID AS Child
,P_Task_ID AS Parent
,common_task. TASK_SEQ AS taskSeq
,1 AS [Level]
,CAST( TASK_SEQ AS VARCHAR(MAX)) AS [taskOrder]
,CAST (Replicate(TASK_SEQ, 1)+' '+ TASK_NAME AS VARCHAR(MAX)) AS [Task_Name]
,common_task.TASK_POSITION AS [TASK_POSITION]
FROM
[COMMON.TASK_REL] as common_task_rel,
[COMMON.TASK] as common_task
WHERE
common_task_rel.C_TASK_ID = common_task.TASK_ID
and common_task.[TASK_TYPE] = 'F' AND common_task.[MODULE_CODE] ='PRODE' AND common_task.[STATUS] <> 'D'
and common_task_rel.P_TASK_ID is null
UNION ALL
SELECT
C_TASK_ID AS Child
,P_Task_ID AS Parent
,common_task. TASK_SEQ AS taskSeq
,[Level] + 1 AS [Level]
,[taskOrder] + '.' + CAST(TASK_SEQ AS VARCHAR(MAX)) AS [taskOrder]
,CAST (Replicate(' ', [Level] + 1) + taskOrder + '.' + CAST(TASK_SEQ AS VARCHAR(MAX))+' ' +common_task.TASK_NAME AS VARCHAR(MAX)) AS [Task_Name]
,common_task.TASK_POSITION AS [TASK_POSITION]
FROM
[COMMON.TASK_REL]as common_task_rel
INNER JOIN
ctLevel
ON
( P_Task_ID = Child ) ,
[COMMON.TASK] as common_task
WHERE
common_task_rel.C_TASK_ID = common_task.TASK_ID
and common_task.[TASK_TYPE] = 'F' AND common_task.[MODULE_CODE] = 'PRODE' AND common_task.[STATUS] <> 'D'
)
SELECT [Parent] ,[Child],taskSeq, Level,[taskOrder],Task_Name,[TASK_POSITION]
FROM ctLevel
order by [taskOrder],[Level],[TASK_POSITION]
我的结果如何:
你可以举例说明 的 10 10.1 10.1.1 10.1.1.1 假设将位于9
的底部是否可以对这些记录进行排序,如下所示
1
2
2.1
2.2
2.4
2.5
2.6
2.7
3
3.1
3.2
4
4.1
4.2
5
5.1
6
6.1
6.2
6.3
6.4
6.5
7
8
9
9.1
9.1
9.1.1
9.1.1.1
9.1.1.2
9.1.1.3
9.1.1.4
10
10.1
10.1.1
10.1.1.1
提前致谢。
答案 0 :(得分:2)
格式化001
之类的数字,例如:
right('000' + convert(varchar(max), [Level] + 1),3)
答案 1 :(得分:2)
对于SQL2008 +
您可以生成hierarchyid值,而不是生成Num1.Num2.Num3
...值,可以轻松地对ASC或DESC进行排序。将VARCHAR值转换为HIERARCHYID数据类型时,必须遵循以下语法:/Num1/Num2/Num3/
:
SELECT *, CONVERT(VARCHAR(50), T.A) AS VarCharHI, T.A.GetLevel()
FROM (VALUES
( CONVERT(HIERARCHYID, '/1/') , 'A' ),
( CONVERT(HIERARCHYID, '/2/11/1/1/1/') , 'C' ),
( CONVERT(HIERARCHYID, '/40/11/1/') , 'D' ),
( CONVERT(HIERARCHYID, '/5/11/') , 'D' ),
( CONVERT(HIERARCHYID, '/2/2/') , 'B' ) ) AS T(A,B)
ORDER BY T.A ASC;
结果:
A B VarCharHI GetLevel()
----------- ---- -------------------------------------------------- ----------
0x58 A /1/ 1
0x6B40 B /2/2/ 2
0x6D75AD60 C /2/11/1/1/1/ 5
0x8EB8 D /5/11/ 2
0xCB1AEB D /40/11/1/ 3
我会做出以下更改:
WITH ctBaseLevel
AS
(
...
,'/' + CAST( TASK_SEQ AS VARCHAR(MAX)) + '/' AS [taskOrder]
...
UNION ALL
...
,[taskOrder] + CAST(TASK_SEQ AS VARCHAR(MAX)) + '/'
...
) , ctLevel
AS
(
SELECT l.*, CONVERT(HIERARCHYID, l.[taskOrder]) AS [taskOrder_HIERARCHYID]
FROM ctBaseLevel l
)
SELECT * FROM cteLevel ORDER BY [taskOrder_HIERARCHYID];