Yes. You can go ahead and drop the old primary key and create the new
primary key. It would not hurt to copy the old table to a new table.





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-----Original Message-----
From: Sheuehua
[mailto:db2udbdba-ezmlmshield-x81185650.[Email address protected]
Sent: Thursday, April 26, 2007 8:53 AM
To: LazyDBA Discussion
Subject: How to rebuild primary key on same table


Hi,
I got a request to rebuild primary key on same table; one table
called "promotion_history", initial has 2 columns as
a primary key; now they want to rebuilt with adding addition one cloumn
(
client_name).
I select with group by to find any count > 1 within those 3 columns to
make
sure not duplicate records.
There is not FK constrants on this table; can I go ahead drop old
primary
key and rebuild the new primary key with 3 colums.
Do I have to copy the old table to a new table, in case of the bulding
failed?

Thanks for your help!!

Sue
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