t-sql recursive query

Question

Based on an existing table I used CTE recursive query to come up with following data. But failing to apply it a level further.

Data is as below

id    nam         


        

Answer 1

Try something like this:

WITH Recursive AS
(
    SELECT
        ID, 
            CAST(PathName AS VARCHAR(500)) AS 'FullPaths', 
            1 AS 'Level'
    FROM 
        dbo.YourTable
    WHERE
        ParentID = 0

    UNION ALL

    SELECT
        tbl.ID, 
            CAST(r.FullPaths + '\' + tbl.PathName AS VARCHAR(500)) AS 'FullPaths', 
            r.Level + 1 AS 'Level' 
    FROM
        dbo.YourTable tbl
    INNER JOIN  
        Recursive r ON tbl.ParentID = r.ID
)
SELECT * FROM Recursive
ORDER BY Level, ID

Output:

ID   FullPaths                    Level
 1   project                            1
 2   project\structure                  2
 3   project\structure\path_1           3
 4   project\structure\path_2           3
 5   project\structure\path_3           3
 6   project\structure\path_1\path_4    4
 7   project\structure\path_2\path_5    4
 8   project\structure\path_3\path_6    4