Re: Check for number only

From: <Diana_Duncan_at_ttpartners.com>
Date: Mon, 21 May 2001 14:20:08 -0700
Message-ID: <F001.00309D71.20010521142209@fatcity.com>

Jared,

That's absolutely true, now. In the past (don't ask me when, I think it was version 7 something), I found that exceptions for some reason took a long time to process. I haven't cured myself of the habit of avoiding them, yet. :)

Thanks for the reminder!

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

                                                                                       
                            
                    Jared Still                                                        
                            
                    <jkstill_at_cybc        To:     ORACLE-L_at_fatcity.com, 
Diana_Duncan_at_ttpartners.com                 
                    on.com>              cc:                                           
                            
                                         Fax to:                                       
                            
                    05/21/2001           Subject:     Re: Check for number only        
                            
                    05:24 PM                                                           
                            
                                                                                       
                            
                                                                                       
                            

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: 
  INET: Diana_Duncan_at_ttpartners.com

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Received on Mon May 21 2001 - 16:20:08 CDT