>-----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 ;
/
--
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--
Author: Jacques Kilchoer
INET: [EMAIL PROTECTED]
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