एसक्यूएल में न्यूमेरिक मैपिंग टेबल से ट्री क्वेरी बनाएं (सेपरेटर फील्ड के साथ)

यह आपको बहुत करीब ले जाना चाहिए... लेकिन मुझे यह स्वीकार करना होगा कि मैं तर्क को पूरी तरह से नहीं समझता... 9401/Acc12 पर "HasChild" को 1 पर क्यों सेट किया गया है?

इसके साथ प्रयास करें। क्रमांकन को SourceCast द्वारा विभाजित किया जाता है। इसका मतलब है, कि दोनों सेट (या कई सेटों को सोर्सकास्ट के आधार पर एक सेट के रूप में माना जाता है। इसके अतिरिक्त एक रनिंग आईडी है, जैसे आपके उदाहरण में:

CREATE TABLE Account(AccountID   NVARCHAR(50) NOT NULL
  ,AccountName NVARCHAR(50) NOT NULL
  ,SourceCast  INTEGER  NOT NULL
  ,PRIMARY KEY (AccountID,SourceCast));

 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11',N'Acc11',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'12',N'Acc12',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'13',N'Acc13',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11/11',N'Acc11/11',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11/12',N'Acc11/12',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11/111',N'Acc11/111',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11/11/001',N'Acc11/11/001',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'11/11/002',N'Acc11/11/002',9401);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15',N'Acc15',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'12',N'Acc12',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'13',N'Acc13',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15/15',N'Acc15/15',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15/12',N'Acc15/12',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15/111',N'Acc15/111',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15/15/001',N'Acc15/15/001',9402);
 INSERT INTO Account(AccountID,AccountName,SourceCast) VALUES (N'15/15/002',N'Acc15/15/002',9402);
GO

WITH DistinctSourceCasts AS (SELECT DISTINCT SourceCast FROM Account)
SELECT *
INTO #tempHierarchy
FROM
(
    SELECT SourceCast
          ,CAST(SourceCast AS NVARCHAR(50)) AS AccountID 
          ,CAST(SourceCast AS NVARCHAR(50)) AS AccountName
          ,0 AS ID
          ,0 AS HierarchyLevel
          ,'' AS ParentPath
          ,'' AS ownID
          ,'' AS ancestorID 
    FROM DistinctSourceCasts
    UNION ALL
    SELECT SourceCast
          ,AccountID
          ,AccountName
          ,ROW_NUMBER() OVER(PARTITION BY SourceCast ORDER BY LEN(AccountID)-LEN(REPLACE(AccountID,'/','')),AccountID) AS ID
          ,Extended.HierarchyLevel
          ,STUFF(
           (
             SELECT '/' + A.B.value('.','varchar(10)')
             FROM Extended.IDsXML.nodes('/x[position() <= sql:column("HierarchyLevel")]') AS A(B)
             FOR XML PATH('')
           ),1,2,'') AS ParentPath
          ,Extended.IDsXML.value('/x[sql:column("HierarchyLevel")+1][1]','varchar(10)') AS ownID
          ,Extended.IDsXML.value('/x[sql:column("HierarchyLevel")][1]','varchar(10)') AS ancestorID
    FROM Account
    CROSS APPLY(SELECT LEN(AccountID)-LEN(REPLACE(AccountID,'/','')) + 1 AS HierarchyLevel
                      ,CAST('<x></x><x>' + REPLACE(AccountID,'/','</x><x>') + '</x>' AS XML) AS IDsXML) AS Extended
) AS tbl;

UPDATE #tempHierarchy SET ParentPath = SourceCast,ancestorID=SourceCast WHERE HierarchyLevel=1;
UPDATE #tempHierarchy SET ownID=SourceCast WHERE HierarchyLevel=0;


WITH RecursiveCTE AS
(
    SELECT th.*
           ,CAST(NULL AS BIGINT) AS ParentID 
           ,CASE WHEN EXISTS(SELECT 1 FROM #tempHierarchy AS x WHERE x.ParentPath=th.AccountID) THEN 1 ELSE 0 END AS HasChild
    FROM #tempHierarchy AS th WHERE th.HierarchyLevel=0
    UNION ALL
    SELECT r.SourceCast
          ,sa.AccountID
          ,sa.AccountName
          ,sa.ID
          ,sa.HierarchyLevel
          ,sa.ParentPath
          ,sa.ownID
          ,sa.ancestorID
          ,(SELECT x.ID FROM #tempHierarchy AS x WHERE x.AccountID=sa.ParentPath)
          ,CASE WHEN EXISTS(SELECT 1 FROM #tempHierarchy AS x WHERE x.ParentPath=sa.AccountID) THEN 1 ELSE 0 END AS HasChild
    FROM RecursiveCTE AS r
    INNER JOIN #tempHierarchy AS sa ON sa.HierarchyLevel=r.HierarchyLevel+1 
                                       AND r.AccountID=sa.ParentPath
                                       AND r.SourceCast=sa.SourceCast
)
SELECT SourceCast
      ,r.AccountID
      ,r.AccountName
      ,ROW_NUMBER() OVER(ORDER BY SourceCast,HierarchyLevel,ParentID,ID) AS ID
      ,r.ID AS GroupedID
      ,r.ParentID
      ,r.HierarchyLevel
      ,r.HasChild
FROM RecursiveCTE AS r

DROP TABLE #tempHierarchy;

परिणाम:

+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| SourceCast | AccountID | AccountName  | ID | GroupedID | ParentID | HierarchyLevel | HasChild |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 9401      | 9401         | 1  | 0         | NULL     | 0              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11        | Acc11        | 2  | 1         | 0        | 1              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 12        | Acc12        | 3  | 2         | 0        | 1              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 13        | Acc13        | 4  | 3         | 0        | 1              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11/11     | Acc11/11     | 5  | 4         | 1        | 2              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11/111    | Acc11/111    | 6  | 5         | 1        | 2              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11/12     | Acc11/12     | 7  | 6         | 1        | 2              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11/11/001 | Acc11/11/001 | 8  | 7         | 4        | 3              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9401       | 11/11/002 | Acc11/11/002 | 9  | 8         | 4        | 3              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 9402      | 9402         | 10 | 0         | NULL     | 0              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 12        | Acc12        | 11 | 1         | 0        | 1              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 13        | Acc13        | 12 | 2         | 0        | 1              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15        | Acc15        | 13 | 3         | 0        | 1              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15/111    | Acc15/111    | 14 | 4         | 3        | 2              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15/12     | Acc15/12     | 15 | 5         | 3        | 2              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15/15     | Acc15/15     | 16 | 6         | 3        | 2              | 1        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15/15/001 | Acc15/15/001 | 17 | 7         | 6        | 3              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+
| 9402       | 15/15/002 | Acc15/15/002 | 18 | 8         | 6        | 3              | 0        |
+------------+-----------+--------------+----+-----------+----------+----------------+----------+