How to remove default value from table definition?

Hi,
running 9.2
Following problem :
I need to remove default value from table.
Example
CREATE TABLE MY_TABLE(
NAME VARCHAR2(50) DEFAULT 'NAME',
AGE NUMBER DEFAULT 0
Now even when I use MODIFY like
ALTER TABLE MY_TABLE MODIFY (NAME VARCHAR2(10) );
The default is still there:
SELECT DATA_DEFAULT FROM USER_TAB_COLUMNS WHERE TABLE_NAME = 'MY_TABLE';
Is there any way?
Thanks

Thanks,
found the answer. It is not possible!!!!
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_3001.htm
Note:
If a column has a default value, then you can use the DEFAULT clause to change the default to NULL, but you cannot remove the default value completely. That is, if a column has ever had a default value assigned to it, then the DATA_DEFAULT column of the USER_TAB_COLUMNS data dictionary view will always display either a default value or NULL

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>
> how to remove blank element from Table and Dropdown
>
Change selection property of related node to from 0..1 to 1..1 (mandatory)
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Message was edited by:
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