Re: Selecting every other code.... why wont THIS work?

Yes, you do.
As soon as add a where-clause the rownums will change...

Try this:
select testtime
, my_rownum
from
( SELECT testtime
  , MOD(rownum,2) my_rownum
   FROM testdata)
where my_rownum = 1

should work,

hth
Frans H.

"elziko" <elziko_at_NOTSPAMMINGyahoo.co.uk> wrote in message news:<3e3e43f6$0$12354$afc38c87_at_news.easynet.co.uk>...
> If I do the following:
>
> SELECT testtime, MOD(rownum,2) FROM testdata
>
> I get the following output:
>
> 0.0 1
> 0.1 0
> 0.2 1
> 0.3 0
> 0.4 1
>
> and so on. So by my reckoning, in order to select only every OTHER row in
> this table I should be able to do:
>
> SELECT testtime FROM testdata WHERE MOD(rownum,2) = 1
>
> But it returns no records! I've obviously missed something here?!?
>
> Cheers,
>
> elziko
Received on Mon Feb 03 2003 - 09:45:55 CST