Question

i have a Url table

UrlId   Followedby
1            NULL
2            1
3            2

i want to write a sp which take urlid as parameter and return all rows.
GetAllUrls 3
and it will return above rows.

Can above doable without cursor ?

Answer 1

Using a recursive CTE it would look like this

declare @UrlId int = 3

;with C as 
(
  select U.UrlId,
         U.Followedby
  from Url as U
  where U.UrlId = @UrlId
  union all
  select U.UrlId,
         U.Followedby
  from Url as U
    inner join C
      on U.UrlId = C.Followedby
)
select UrlId,
       Followedby 
from C

https://data.stackexchange.com/stackoverflow/q/119027/