Short answer: it's all in documentation. Look there. Long answer: As far you have not give more details, just set it as primary key. This guarantee no duplicates, and no nulls. Don't forget to set this in database too (all good databases around the world support primary keys).
Other way: in OJB uses it as normal field, and in database create a UNIQUE index. Almost all databases knows the UNIQUE concept. If it need be auto-generated, look docs about auto-increment. If it isn't numeric, and need be unique, you can create your own Sequence Manager. Check docs. Best regards, Edson Richter ----- Original Message ----- From: Muhammad Aamir To: OJB Users List Sent: Friday, February 13, 2004 9:25 AM Subject: RE: Unique column Re-post -----Original Message----- From: Muhammad Aamir Sent: Wednesday, February 11, 2004 9:51 AM To: [EMAIL PROTECTED] Subject: Unique column There is a column that I want it to be unique in the table. How can I implement this business rule ?? Thanks Aamir --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.587 / Virus Database: 371 - Release Date: 12/2/2004
