RE: Primary Keys optional?

Besides, having validation and integrity in the database has important performance improvements. Primary keys and referential integrity helps the cbo to take cleverer actions and produce better plans. I do not have a test case for that now but i remember lots of them at the asktom site. Or we must ask Jonathan Lewis about that :-)

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of William B Ferguson Sent: Thursday, August 17, 2006 11:45 PM To: Khemmanivanh, Somckit
Cc: andert_at_gmail.com; jkstill_at_gmail.com; oracle-l_at_freelists.org; oracle-l-bounce_at_freelists.org
Subject: RE: Primary Keys optional?

It's rarely good practice to ever depend on an application for data validation and integrity. Things (and applications) change.

Depend on the database for these simple and basic steps instead of the application. And, if the application does do data validation and integrity, nothing is broken anyway by enabling it at the database level.

                              Bill Ferguson
           U.S. Geological Survey - Minerals Information Team
                          PO Box 25046, MS-750
                          Denver Federal Center
                         Denver, Colorado 80225
          Voice (303)236-8747 ext. 321     Fax   (303)236-4208
     ~ Think on a grand scale, start to implement on a small scale ~

"Khemmanivanh, Somckit" <somckit.khemmanivanh_at_weyerhaeuser.com>

08/17/2006 02:39 PM

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<wbfergus_at_usgs.gov>, <jkstill_at_gmail.com>

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RE: Primary Keys optional?           

Could the data validations/verification be done at the App level?

Of course, the developers should have know this if that were the case...

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