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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