Re: How to find non printable characters in a column using regexp

On 4/13/07, dd yakkali <dd.yakkali_at_gmail.com> wrote:
>
> Madhu,
>
> thanks for the response, for some reason, it is not working for me. Do you
> know what is meant by non printable characters?
>
> what i am looking for is any character outside of ascii value 32 and ascii
> value 126
>
> I thought by control they meant that.
>
> Here is what I found on the web
>
>
> select count(*) from
> njcrc.tblprogram where replace(translate(lower(description ),'
> abcdefghijklmnopqrstuvwxyz1234567890_-+=()*&^%$#@!~`;:}{][|\/?.,><"'''||chr(
> 10)||chr( 13)||chr(9 ),'X'),'X' ,'') is not null;
>

control is not the same as non-printable but not sure where they differ. If you are looking specifically for non-print, there is a [:print:], so the equiv would be:

 select regexp_replace(string, '[[:print:]]') from dual; --to give only non-print characters.

-Madhu S

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