I sure would like to take that back now. I was thinking of validate / novalidate. DISABLE / ENABLE was available in Oracle 7 and probably earlier. As another poster said, in Oracle 7.3.4, you will need to fix the data. Or if you want to have a constraint but can't fix the data, you could write a trigger that emulates the constraint. -----Original Message----- Jacques Kilchoer I'm pretty sure that disabling / enabling constraints was introduced in Oracle 8.0. Are you sure you have the database version right? -----Original Message----- Seema Singh One of my database is 7.34 on hp-ux.Somehow one of our developer disable one of constraints.When I have tried to enable i noticed ora-02298 because of data inconsistent. When I run ALTER TABLE <NAMEOFTABLE> ENABLE NONVALIDATE CONSTRAINT <NAMEOF CONSTRAINT>; Didn't work.WOndering is there anyway we can enable constraints forecelly or -- //www.freelists.org/webpage/oracle-l