RE: Is there any way we can exclude all possible values ?

This works too:

create table test (
       col1 number(4) not null,
       col2 varchar2(10) check (col2 in (null))
    );

Andrew W. Kerber
Oracle DBA
UMB


"If at first you dont succeed, dont take up skydiving"

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Greg Norris
Sent: Friday, December 29, 2006 9:48 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Is there any way we can exclude all possible values ?

On 12/29/06, xiaoyan <xiaoyezi.xyz@xxxxxxx> wrote:
>    Is there any way we can exclude all possible values to be  assigned
to a
> column in a table  without knowing the type of the column ?

While I really don't see any point to this, something like the
following should work...

SQL> create table test (
  2     col1 number(4) not null,
  3     col2 varchar2(10) constraint what_the_heck check (0=1)
  4  );

Table created.

SQL> insert into test values (1, 'test');
insert into test values (1, 'test')
*
ERROR at line 1:
ORA-02290: check constraint (SYSTEM.WHAT_THE_HECK) violated

SQL> insert into test values (1, NULL);
insert into test values (1, NULL)
*
ERROR at line 1:
ORA-02290: check constraint (SYSTEM.WHAT_THE_HECK) violated

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