How do I generate row number without using rownum() in sql server

Question

I have the following table:

CREATE table prd
(
prdid varchar(10)
)
insert into prd values (\'prd1011\'),(\'prd1023\'),(\'prd4532\'),(\'prd2341\')
         


        

Answer 1

I tried this and it worked but it is working only if the prdid column is unique:

select prdid,
(select COUNT(*) from prd p where p.prdid >= r.prdid)rnk
from prd r order by rnk