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Using NonUnique Index to Enforce Uniqueness

From: dd <dd_at_dd.com>
Date: Wed, 23 Feb 2005 16:46:27 +0800
Message-ID: <421c44f6$1_3@rain.i-cable.com> 





Oracle manual describes using non unique index to enforce unique constraint
so that the index will not be dropped with constraint is diabled.



But I dont understand why non unique index can enforce uniqueness?
Received on Wed Feb 23 2005 - 02:46:27 CST












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