Re: is number

In article <8pq049$dn8$1_at_goliat.eik.bme.hu>,   Horvath Andras <raas_at_balu.sch.bme.hu> wrote:
> eastking_at_my-deja.com wrote:
> > I'd like to insert a row whose id is max(to_number(id))+1 into this
> > table . In this case , the id should be 3. But to_number('ab') will
> > cause a error.How can I achieve it by only a SQL command.
>
> select max(to_number(id)) from table where id>'0' and id<'99';
>
> will work well, provided that the field id is 2 characters long at
 max.
>
> raas
> --
> "With enough free time, effort, and an input string that looks like
 the
> winning entry in last year's obfuscated-C contest, you can turn
> someone's simple mistake into a nationally syndicated news story."
>

I'm afraid it can not work well. Try following

select 'yes' from dual where '1a' > '0' and '1a' < '99'

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Before you buy. Received on Thu Sep 14 2000 - 21:43:04 CDT