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

On 4/13/07, dd yakkali <dd.yakkali_at_gmail.com> wrote:
>
> I am trying to find the records where there are non printable characters,
> i am not having success with it
>
>
> select
> * from njcrc .tblprogram where REGEXP_INSTR(description,'[[:cntrl:]]') >0;
>
>
>
> Above sql pulls records where there are no "non printable" characters.
>
> Can any point me to an alternate way achieving this or let me know what am
> i doing wrong.
>
>
>
> Thanks
>
> Deen
>

how about this:
select regexp_replace(string,'[^[:cntrl:]]') from dual; --returns just control characters.

-Madhu S

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