Or, how about: http://www.oreilly.com/catalog/oracleregexpr/
| Mladen Gogala <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 09/22/2003 06:44 PM
|
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> cc: Subject: Re: Isnumeric question |
Here is a good impossible solution which can be used
to make this list drool:
http://technet.oracle.com/oramag/webcolumns/2003/techarticles/rischert_regexp_pt1.html
On 2003.09.22 21:24, Jacques Kilchoer wrote:
> >-----Original Message-----
> >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of
> Teresita Castro
> >
> >I want to made something like this ina query
> >
> >select decode( isnumeric(line_comment), to_number(line_comment),0)
> >
> >how can I do this in Oracle?
>
> First you need to define what "isnumeric" means to you.
> Does it mean
> a) this string only contains ASCII characters 0 through 9
> b) this string only contains ASCII characters 0 through 9 with maybe one
> decimal point (as determined by my NLS settings)'
> c) this string only contains ASCII characters 0 through 9 with maybe one
> decimal point and group separators (as determined by my NLS settings)
> d) 'this string contains a valid ORACLE number constant' e.g. -2.3e+10 is a
> valid number?
> e) something else (minus signs, etc.)
>
> If the answer is d), then (from an old idea by Jared Still) create your own
> function
> create function is_number (str in varchar2)
> return number
> is
> x number ;
> begin
> x := to_number (str) ;
> return 1 ;
> exception
> when value_error
> then
> return 0 ;
> when others
> then
> raise ;
> end ;
> /
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Jacques Kilchoer
> INET: [EMAIL PROTECTED]
>
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--
Mladen Gogala
Oracle DBA
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Mladen Gogala
INET: [EMAIL PROTECTED]
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