如何獲得的自我引用的表中的每個記錄

Question

我有一個表，如下的所有子：

 
ID | ChildsID | Name   
-----------------------    
1  NULL  Name1 
2  1   Name2 
3  2   Name3 
4  3   Name4 
5  4   Name5 
6  5   Name6 
7  6   Name7 
8  7   Name8 
9  8   Name9 
10  9   Name10 
11  3   Name11 

現在我想一個查詢，可以得到所有可能的孩子具有至少每個記錄孩子，並返回給我一個像這樣的數據集：

 
ID | ParentID | Name | ParentIDs   
-----------------------------------------    
1  NULL  Name1  11,10,9,8,7,6,5,4,3,2 
2  1   Name2  11,10,9,8,7,6,5,4,3 
3  2   Name3  11,10,9,8,7,6,5,4 
4  3   Name4  10,9,8,7,6,5 
5  4   Name5  10,9,8,7,6 
6  5   Name6  10,9,8,7 
7  6   Name7  10,9,8 
8  7   Name8  10,9 
9  8   Name9  10

Answer 1

使用此查詢。

更新結果：Fiddler Demo

CREATE TABLE TABLE1 (ID INT, ParentID INT, NAME VARCHAR(10)); 
INSERT INTO TABLE1 VALUES(1, NULL, 'Name1'); 
INSERT INTO TABLE1 VALUES(2, 1, 'Name2'); 
INSERT INTO TABLE1 VALUES(3, 2, 'Name3'); 
INSERT INTO TABLE1 VALUES(4, 3, 'Name4'); 
INSERT INTO TABLE1 VALUES(5, 4, 'Name5'); 
INSERT INTO TABLE1 VALUES(6, 5, 'Name6'); 
INSERT INTO TABLE1 VALUES(7, 6, 'Name7'); 
INSERT INTO TABLE1 VALUES(8, 7, 'Name8'); 
INSERT INTO TABLE1 VALUES(9, 8, 'Name9'); 
INSERT INTO TABLE1 VALUES(10, 9, 'Name10'); 
INSERT INTO TABLE1 VALUES(11, 3, 'Name11'); 

    SELECT ID, ParentID , Name, Child = STUFF((
      SELECT ',' + CAST(B.ID AS VARCHAR(100)) FROm TABLE1 AS B 
      WHERE ISNULL(A.ID, 0) < B.ID AND B.ID NOT IN(
       ISNULL((SELECT TOP 1 C.ID FROm TABLE1 AS C 
         WHERE C.ParentID IN (
          SELECT ParentID FROM TABLE1 WHERE ID <= A.ID) 
         ORDER BY C.ID DESC), 0)) 
      ORDER BY B.ID DESC 
      FOR XML PATH (''), type).value('.', 'varchar(max)'), 1,1,'') 
FROm TABLE1 AS A 

老結果：

SELECT ID, ParentID , Name, ParentIDs = STUFF((
    SELECT ',' + CAST(B.ID AS VARCHAR(100)) FROm MyTable AS B 
    WHERE ISNULL(A.ID, 0) < B.ID ORDER BY B.ID DESC FOR XML PATH (''), type).value('.', 
      'varchar(max)'), 1,1,'') 
FROm MyTable AS A 

Answer 2

你可以嘗試使用這一個：

SELECT a.*,x.ParentIDs 
    FROM YourTable a 
    CROSS APPLY (SELECT STUFF(CAST((SELECT ',' + CONVERT(VARCHAR,b.ID) 
    FROM YourTable b WHERE b.ID > a.ID AND ISNULL(b.ParentID,0) > ISNULL(a.ParentID,0) ORDER BY ID DESC 
    FOR XML PATH(''), TYPE) AS VARCHAR(MAX)),1,1,'') AS ParentIDs) x 
    WHERE x.ParentIDs IS NOT NULL