Oracle-L: RE: randomly generate unique key

From: Mark Moynahan <Mark.Moynahan_at_apollogrp.edu>
Date: Fri, 30 May 2003 10:14:43 -0800
Message-ID: <F001.005A71CC.20030530101443@fatcity.com>

One way to get around this issue is to continue to use the sequence and concatenate some random numbers. The random generated number could look something like this sequence.nextval||to_char(sysdate,'DDDSSSSS').

Mark

-----Original Message-----
Sent: Friday, May 30, 2003 8:45 AM
To: Multiple recipients of list ORACLE-L

Hi List,

Originally, Our next generate directory group use sequence # to generate a unique key. (we can't use emplid or social s # as key, since students doesn't have emplid and some foreign students doesn't have ssn). That works fine until the policy changed, they need to publish the unique key which is trunk id. According to the developers, if publish those sequenced unique key, it will create some problems, since the community can guess the next sequence # and got unnecessary info associated with it. Now the question is how to create a random unique key? The idea is create a function call combine the 3 components (date, time, MAC address) to generate a random #. Does the date/time (client query system time)can always be unique or can be duplicated? Does someone has any idea or experience to generate those randomly unique key?

Any info would be helpful.

Thanks in advance,

Joan
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Author: Joan Hsieh
INET: joan.hsieh_at_tufts.edu

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Author: Mark Moynahan
INET: Mark.Moynahan_at_apollogrp.edu

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