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CREATE TABLE Data ( ID VARCHAR(10), NextID VARCHAR(10) ) INSERT Data VALUES ('1','5'), ('2','0'), ('3','6'), ('4','7'), ('5','8'), ('6','9'), ('7','0'), ('8','0'), ('9','10'), ('10','0') ;WITH RecursivePaths As ( SELECT ID, ID As Leaf, CAST(ID AS VARCHAR(MAX)) AS Path FROM Data WHERE NextID = '0' UNION ALL SELECT D.ID, R.Leaf, CAST(D.ID AS VARCHAR(MAX)) + ' --> ' + R.Path FROM RecursivePaths As R INNER JOIN Data As D ON D.NextID = R.ID ), SortedPaths As ( SELECT Leaf, Path, ROW_NUMBER() OVER (PARTITION BY Leaf ORDER BY Len(Path) DESC) As RN FROM RecursivePaths ) SELECT Path FROM SortedPaths WHERE RN = 1 ;
Path
3 --> 6 --> 9 --> 10
2
4 --> 7
1 --> 5 --> 8