Re: How to add a primary key column

Ralf Zwanziger wrote:

> 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

1. Rename the table
2. CREATE TABLE <original_table_name> AS SELECT sequence_name.NEXTVAL AS column_alias, field_name, field_name FROM renamed_table;

--
Daniel Morgan
http://www.outreach.washington.edu/extinfo/certprog/oad/oad_crs.asp
damorgan_at_x.washington.edu
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