On Thu, Mar 27, 2003 at 13:43:10 -0600,
Tad Marko <tad@tadland.net> wrote:
> Hello,
>
> I'm having a small difficulty that I am hopeful there is a simple solution
> for. Basically, I am doing a join on a column that is numeric in one
> database but a string in the other. Something like:
>
> ...WHERE a.numeric_zipcode=b.string_zipcode::integer...
>
> The problem is that occasionally the string zip field has some
> non-numeric characters. Unfortunatley, I cannot control the sanity of the
> string zip field. The question is if there is any way that in the same
> query I can filter out the rows that have non-number characters in the zip
> field?
Why don't you compare them as strings? You can use to_char to force the
numeric zip code to 5 digits.