Oracle-L: RE: Changing column format

From: Fink, Dan <Dan.Fink_at_mdx.com>
Date: Thu, 07 Nov 2002 12:54:16 -0800
Message-ID: <F001.004FE44C.20021107125416@fatcity.com>

David,

First, check the username column to insure that there are no duplicate entries. If there are, you cannot make it a primary key.

Second, remove the current primary key constraint as there can only be one primary key constraint per table.

Third, create the new primary key constraint.

Dan Fink

-----Original Message-----
Sent: Thursday, November 07, 2002 1:34 PM To: Multiple recipients of list ORACLE-L

I create a table to store user account information and set "userid" column to be primary key. I now want to set "username" to be primary key instead of "userid", how do I change it? There are couple hundreds of records in table. Please advise.

Thanks,
David
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Author: Nguyen, David M
INET: david.m.nguyen_at_xo.com

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Author: Fink, Dan
INET: Dan.Fink_at_mdx.com

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