Of course here is my favorite constraint story...
column has NOT NULL constraint and CHECK constraint with list of values
including ('NULL')
-----Original Message-----
Sent: Thursday, January 30, 2003 1:56 PM
To: Multiple recipients of list ORACLE-L
I concur.
Then the duhvelopers don't have to bug you when they
determine that their 'never changing' list of values
was incomplete.
Jared
"Mercadante, Thomas F" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
01/30/2003 10:45 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: RE: Restricting the range of values in a field
look at foreign key constraints - data in columns allowed only if the
value
exists in another table. best resolution because you can add values
without
recompiling any code.
-----Original Message-----
Sent: Thursday, January 30, 2003 11:01 AM
To: Multiple recipients of list ORACLE-L
Is there any way you can specify that the only permissible values (is it
called a domain?) that can be entered in varchar2 field in an Oracle
table to, for example, A, B and C?
We can restrict what values users can enter at the application level,
but it would be nice to be able to also restrict what can be entered at
the database level, in case other means of entering data are ever used
or if the application layer fails, for whatever reason, to trap an
unwanted value.
Thanks
--
Aidan Whitehall <[EMAIL PROTECTED]>
Macromedia ColdFusion Developer
Fairbanks Environmental Ltd +44 (0)1695 51775
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