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Re: Adding a unique number to each record in a table

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On 10/24/2011 11:19 AM, Alexander Farber wrote:
Hello,

I have a table in PostgreSQL 8.4.9 storing
user comments (in the "about" field):

# \d pref_rep
                  Table "public.pref_rep"
    Column   |            Type             |   Modifiers
------------+-----------------------------+---------------
  id         | character varying(32)       |
  author     | character varying(32)       |
  good       | boolean                     |
  fair       | boolean                     |
  nice       | boolean                     |
  about      | character varying(256)      |
  last_rated | timestamp without time zone | default now()
  author_ip  | inet                        |
Check constraints:
     "pref_rep_check" CHECK (id::text<>  author::text)
Foreign-key constraints:
     "pref_rep_author_fkey" FOREIGN KEY (author) REFERENCES pref_users(id)
     "pref_rep_id_fkey" FOREIGN KEY (id) REFERENCES pref_users(id)

But now after having 40000 comments I've
realized, that I need a web script for me as
admin - for delete obscene/aggressive ones.

Because doing it thru "psql" is tedious + error prone.

Is there please a way to add a column to my table,
which I could use to uniquely identify each
record in that table (incl. old records)

Regards
Alex


alter table pref_rep add rowid serial;

Will both add the column and set it for existing rows, as well as for new rows.

-Andy

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