J'ai modifié ma réponse donnée dans la première question...
Il serait préférable que votre table conserve les données de relation directement dans des colonnes indexées. Avant de modifier la structure de votre tableau, vous pouvez essayer ceci :
Un tableau avec des données de test
DECLARE @tbl TABLE ( AccountID VARCHAR(100), AccountName VARCHAR(100));
INSERT INTO @tbl VALUES
('11','Acc11')
,('12','Acc12')
,('13','Acc13')
,('11/11','Acc11/11')
,('11/12','Acc11/12')
,('11/111','Acc11/111')
,('11/11/001','Acc11/11/001')
,('11/11/002','Acc11/11/002')
,('12/111','Acc12/111')
,('12/112','Acc12/112');
Cela obtiendra les données nécessaires dans une table temporaire nouvellement créée appelée #tempHierarchy
SELECT AccountID
,AccountName
,ROW_NUMBER() OVER(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
INTO #tempHierarchy
FROM @tbl
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
;
Le résultat intermédiaire
+-----------+--------------+----+----------------+------------+-------+------------+
| AccountID | AccountName | ID | HierarchyLevel | ParentPath | ownID | ancestorID |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11 | Acc11 | 1 | 1 | | 11 | |
+-----------+--------------+----+----------------+------------+-------+------------+
| 12 | Acc12 | 2 | 1 | | 12 | |
+-----------+--------------+----+----------------+------------+-------+------------+
| 13 | Acc13 | 3 | 1 | | 13 | |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11/11 | Acc11/11 | 4 | 2 | 11 | 11 | 11 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11/111 | Acc11/111 | 5 | 2 | 11 | 111 | 11 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11/12 | Acc11/12 | 6 | 2 | 11 | 12 | 11 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 12/111 | Acc12/111 | 7 | 2 | 12 | 111 | 12 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 12/112 | Acc12/112 | 8 | 2 | 12 | 112 | 12 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11/11/001 | Acc11/11/001 | 9 | 3 | 11/11 | 001 | 11 |
+-----------+--------------+----+----------------+------------+-------+------------+
| 11/11/002 | Acc11/11/002 | 10 | 3 | 11/11 | 002 | 11 |
+-----------+--------------+----+----------------+------------+-------+------------+
Et maintenant, une approche récursive similaire a lieu comme dans ma première réponse. Mais - comme il utilise maintenant une vraie table et que toute la séparation des chaînes a déjà eu lieu - cela devrait être plus rapide...
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=1
UNION ALL
SELECT 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
)
SELECT r.AccountID
,r.AccountName
,r.ID
,r.ParentID
,r.HierarchyLevel
,r.HasChild
FROM RecursiveCTE AS r
ORDER BY HierarchyLevel,ParentID;
Et enfin je nettoie
DROP TABLE #tempHierarchy;
Et voici le résultat final
+-----------+--------------+----+----------+----------------+----------+
| AccountID | AccountName | ID | ParentID | HierarchyLevel | HasChild |
+-----------+--------------+----+----------+----------------+----------+
| 11 | Acc11 | 1 | NULL | 1 | 1 |
+-----------+--------------+----+----------+----------------+----------+
| 12 | Acc12 | 2 | NULL | 1 | 1 |
+-----------+--------------+----+----------+----------------+----------+
| 13 | Acc13 | 3 | NULL | 1 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 11/11 | Acc11/11 | 4 | 1 | 2 | 1 |
+-----------+--------------+----+----------+----------------+----------+
| 11/111 | Acc11/111 | 5 | 1 | 2 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 11/12 | Acc11/12 | 6 | 1 | 2 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 12/111 | Acc12/111 | 7 | 2 | 2 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 12/112 | Acc12/112 | 8 | 2 | 2 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 11/11/001 | Acc11/11/001 | 9 | 4 | 3 | 0 |
+-----------+--------------+----+----------+----------------+----------+
| 11/11/002 | Acc11/11/002 | 10 | 4 | 3 | 0 |
+-----------+--------------+----+----------+----------------+----------+
