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Home -> Community -> Usenet -> c.d.o.server -> Re: How to get back useful error messages?
A copy of this was sent to roy_at_popmail.med.nyu.edu (Roy Smith)
(if that email address didn't require changing)
On Tue, 15 Sep 1998 11:52:35 -0400, you wrote:
>tkyte_at_us.oracle.com wrote:
>> create table t1 ( x int
>> constraint "t1.x cannot be null" check ( x is not null )
>> );
>
>This works fine for NOT NULL, but what about UNIQUE? If I do:
>
>create table t1 (x int constraint "x must be unique" check (x is unique));
>
>I get:
>
>ORA-00908: missing NULL keyword
You've got to use valid syntax for the unique constraint. I used a check constraint -- not a unique constraint. To do unique, you would:
SQL> create table t1 ( x int constraint "x must be UNIQUE" unique ); Table created.
SQL> insert into t1 values ( 1 );
1 row created.
SQL> insert into t1 values ( 1 );
insert into t1 values ( 1 )
*
ERROR at line 1:
ORA-00001: unique constraint (TKYTE.x must be UNIQUE) violated
Thomas Kyte
tkyte_at_us.oracle.com
Oracle Government
Herndon VA
--
http://govt.us.oracle.com/ -- downloadable utilities
Anti-Anti Spam Msg: if you want an answer emailed to you, you have to make it easy to get email to you. Any bounced email will be treated the same way i treat SPAM-- I delete it. Received on Tue Sep 15 1998 - 12:07:10 CDT
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