If you want to add a SERIAL field to an existing table, create a sequence
and then create an integer field with default nextval(seq) and postgres
will fill it automatically. The order in which it will fill it is not
guaranteed though !
However, you might also like to de-dupe your data once it's in the
additional tables, thus you might need more complicated measures.
> (2) How should I go to create a sequence for an existing table? For all
> futures data entry, after this conversion, I want the unique ID for each
> row to come from a sequence, but if I know how to create a table using
> serial, I am not sure how to modify one for this.
>
> Thanks,
> Bernard
>
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