RE: Restricting the range of values in a field

From: Mercadante, Thomas F <NDATFM_at_labor.state.ny.us>
Date: Thu, 30 Jan 2003 10:45:16 -0800
Message-ID: <F001.0053F3B7.20030130104516@fatcity.com>

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 <aidanwhitehall_at_fairbanks.co.uk> Macromedia ColdFusion Developer
Fairbanks Environmental Ltd +44 (0)1695 51775

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Author: Aidan Whitehall
  INET: AidanWhitehall_at_Fairbanks.co.uk

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Author: Mercadante, Thomas F
  INET: NDATFM_at_labor.state.ny.us

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To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Thu Jan 30 2003 - 12:45:16 CST