SQL 存储过程查找所有父ID

--查找父，包括自己
CREATE PROC  [dbo].[usp_spGetParentsID]
@InputID INT
--@ParentID UNIQUEIDENTIFIER OUTPUT
AS
BEGIN
    DECLARE @strResult Nvarchar;
    set @strResult='';
    with cte as
(
select ID,ParentID from Zitian_Categories where id=@InputID
union all
select a.id,a.ParentID from Zitian_Categories a join cte b on a.id=b.parentid
)

select CONVERT(NVARCHAR,[id]) from cte

--SELECT @strResult=CONVERT(NVARCHAR,[id])+','+@strResult from cte
--set @strResult=substring(@strResult,1,(len(@strResult)-1))
--print @strResult

END