How to read all records recursively and show TSQL level depth

Question

Is there a way to recursively read records in a similar table and order by depth level?

#table:

id int    |   parent int    |   value string
--------------------------------------------
1             -1                some
2             1                 some2
3             2                 some3
4             2                 some4
5             3                 some5
6             4                 some6
7             3                 some5
8             3                 some5
9             8                 some5
10            8                 some5

So, there is a way to recursively select where the result table will look.

select * from #table where id=3 

id int      | parent int      | value string   |  depth  
--------------------------------------------------------
3             2                 some3             0
5             3                 some5             1
7             3                 some5             1 
8             3                 some5             1
9             8                 some5             2
10            8                 some5             2

So, if I choose id = 3, I will see recursion for id = 3 and children

thank

Answer 1

;with C as
(
  select id,
         parent,
         value,
         0 as depth
  from YourTable
  where id = 3
  union all
  select T.id,
         T.parent,
         T.value,
         C.depth + 1
  from YourTable as T
    inner join C  
      on T.parent = C.id
)
select *
from C

SE-Data

Answer 2

You can perform the use of CTE, in particular rCTE.

See this and this for more information .

Example:

WITH sampleCTE (id, parent, value, depth)
    AS (
        -- Anchor definition
        SELECT id
            , parent
            , value
            , 0
        FROM #table
        WHERE id = @targetId
        -- Recursive definition
        UNION ALL
        SELECT child.id
            , child.parent
            , child.value
            , sampleCTE.depth + 1
        FROM #table child 
            INNER JOIN sampleCTE ON sampleCTE.id = child.parent
    )