Re: How to add a primary key column

Originally posted by Ralf Zwanziger
> I have a Table without a primary key and want to add a primary key.
> The problem is: how to update the existing columns with unique number
> values? I have the table with a column PK_Table and a sequence
> SEQ_Table. I thought the following statement would do it:
>
> Update Table set PK_Table = (select SEQ_Table.NextVal from dual)
>
> but this only results in ORA-02287: Sequence not allowed here.
> Any idea how to solve the problem, maybe with a cursor in PL/SQL?
>
> Thanks,
> Ralf

One way would be:

Update Table set PK_Table = ROWNUM;

Then set the sequence so that it continues from MAX(PK_Table)+1

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