Checking of parent item

Question

Experts,
If I fetch items from OITM table, how to check if the item is having a parent item or not in BOM? Then again tht parent item is having parent or not...etc

Answer 1

While @Next<=ISNULL((select COUNT (Father) from @temp), 0)
          Begin
          select @fathercode = Father from @temp where (select ROW_NUMBER() over (order by Father)from @temp = @Next)
               select T1.Father , T1.Code  from ITT1 T1 where T1.Code=@fathercode
               set @Next = @Next + 1
               End
               insert into @temp select T1.Father from ITT1 T1 where T1.Code = @fathercode
select @fathercode = Father from @temp where (select ROW_NUMBER() over (order by Father)from @temp = @Next)
this line gives error...How can we get the row id in SQL server and put it in a condition?
plz help