*and* a not null constraint, or else you can get:

SQL> create table x ( p number, q number default 9);

Table created.

SQL> insert into x (p) values (1);

1 row created.

SQL> insert into x (p,q) values (2,null);

1 row created.

SQL> select * from x;

         P          Q
---------- ----------
         1          9
         2


hth
connor

 --- [EMAIL PROTECTED] wrote: > 
> 
> a default value.
> 
> 
> 
> 
> |--------+------------------------->
> |        |                         |
> |        |                         |
> |        |          andreyb@elronte|
> |        |          lesoft.com     |
> |        |                         |
> |        |          05/13/2002     |
> |        |          12:23 PM       |
> |        |          Please respond |
> |        |          to ORACLE-L    |
> |        |                         |
> |--------+------------------------->
>  
>
>----------------------------------------------------|
>   |                                                 
>   |
>   |       To:     [EMAIL PROTECTED]              
>   |
>   |       cc:     (bcc: Rachel Carmichael)          
>   |
>   |       Subject:     A trigger vs. "default value"
> in|
>   |       a table                                   
>   |
>  
>
>----------------------------------------------------|
> 
> 
> 
> 
> Dear list !
> I need a very simple thing : each time a certain
> field is null during an
> insert, to substitiute a string "AAA" instead.
> What is better : to write a trigger to do so or to
> define a default value
> for that column in the table ?
> Thanks !
> 
> 
> DBAndrey
> 
> * 03-9254520
> * 058-548133
> * mailto:[EMAIL PROTECTED]
> 
> 
> 
> 
> --
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=====
Connor McDonald
http://www.oracledba.co.uk
http://www.oaktable.net

"Some days you're the pigeon, some days you're the statue"

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