Remove all non-number characters from a string

hi
How i can remove all non-number characters from a column ? for example , i have a column that contains data like
'sd3456'
'gfg87s989'
'45/45fgfg'
'4354-df4456'
and i want to convert it to
'3456'
'87989'
'4545'
'43544456'
thx in adv

Or in 9i,
Something like this ->
satyaki>
satyaki>with vat
2 as
3    (
4      select 'sd3456' cola from dual
5      union all
6      select 'gfg87s989' from dual
7      union all
8      select '45/45fgfg' from dual
9      union all
10      select '4354-df4456' from dual
11    )
12 select translate(cola,'abcdefghijklmnopqrstuvwxyz-/*#$%^&@()/?,<>;:{}[]|\`"',' ') res
13 from vat;
RES
3456
87989
4545
43544456
Elapsed: 00:00:00.00
satyaki>
{code}
I checked this with minimum test cases. It will be better if you checked it with other cases.
Regards.
Satyaki De.

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Removing non-numeric characters from string

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mstatus number :=0;
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How can I remove all non-alpha-numeric characters from a string? (i.e. only alpha-numerics should remain in the string).

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Extract from the help for the Search and Replace String function :
Right-click the Search and Replace String function and select Regular Expression from the shortcut menu to configure the function for advanced regular expression searches and partial match substitution in the replacement string.
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Attachments:
Example_VI_BD4.png ‏2 KB

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Remove all non-number characters from a string

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