Assuming that you have n columns in the PK and the first n-1 columns are
enough for PK.
1) Why not leave this as it is?
2) If you do not want to change everything at once you can create a
unique index on the first n-1 columns and start to move the constraints
to this index. When all is done just drop the PK constraint and you are
done.
All the fields should be already not null and the unique index on top of
this gives you a PK.
Adar Yechiel Rechovot, Israel
manoj.gurnani@xxxxxxxxxxxxx wrote:
Hi, What are different steps to be followed in modifying a primary key(PK1) to exclude last primary key column from a list of primary key columns. assuming referential integrity constraints exists on primary key in diff tables. give necesary sql syntax to perform the tasks .
Thanks Manoj
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