Re: Check for number only

From: Jared Still <jkstill_at_cybcon.com>
Date: Mon, 21 May 2001 14:22:21 -0700
Message-ID: <F001.00309D3E.20010521141711@fatcity.com>

Diane,

If you rely on Oracle to do the checking, it will be much faster.

Jared

create or replace function is_number( chk_data_in varchar2 ) return boolean
is

        dummy number(38,4);
begin

        dummy := to_number(chk_data_in);
        return true;

exception
when value_error then

        return false;
when others then

        raise;
end;
/         

show errors function is_number

declare

        v_test varchar2(10) := '1E';
begin

        if is_number(v_test) then
                dbms_output.put_line(v_test || ' is a number');
        else
                dbms_output.put_line(v_test || ' is NOT a number');
        end if;

end;
/

On Friday 18 May 2001 11:27, Diana_Duncan_at_ttpartners.com wrote:
> You could always write your own function. Or you could do something using
> the replace() function, maybe like this (again, untested):
>
> select circ_id, circ_num from circuit
> where replace(circ_num,
> 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890',
> 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') is not null;
>
> Depending on your data, you may need to check for punctuation and special
> characters as well.
>
> HTH,
>
> Diana Duncan
> TITAN Technology Partners
> One Copley Parkway, Ste 540
> Morrisville, NC 27560
> VM: 919.466.7337 x 316
> F: 919.466.7427
> E: Diana_Duncan_at_ttpartners.com
>
>
>
> Glenn Travis
> <c-glenn.travis To: Multiple recipients of
> list ORACLE-L <ORACLE-L_at_fatcity.com> @wcom.com> cc:
> Sent by: Fax to:
> root_at_fatcity.co Subject: Check for number
> only m
>
>
> 05/18/2001
> 12:17 PM
> Please respond
> to ORACLE-L
>
>
>
>
>
>
> I have a table with a column of varchar2(50) datatype. We are building a
> new table and the values in this column should all be numbers. I need to
> query the table to find all rows which have a value in this column which is
> not a valid number.
>
> Table:
> circuit (circ_id (primary_key) number, circ_num varchar2(50))
>
> Example: find all values in circ_num which are not numbers.
> how do I do something like 'select circ_id, circ_num from circuit where
> circ_num not valid to_number(circ_num)'
>
> Is there a function to check this?
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Glenn Travis
> INET: c-glenn.travis_at_wcom.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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Received on Mon May 21 2001 - 16:22:21 CDT