On Tue, Oct 12, 2010 at 3:10 PM, Ben Kim <bkim@tamu.edu> wrote:
> create table test_dup (id serial primary key, val text);
> insert into test_dup(val)values('some text');
> insert into test_dup(val)values('some texta');
>
> select * from test_dup;
> id | val
> ----+------------
> 1 | some text
> 2 | some texta
SELECT Array_agg( id ) AS duplicate_ids, val
FROM test_dup
GROUP BY val
HAVING COUNT(*) > 1;
SELECT T1.id, T2.id, T.val
FROM test_dup AS T1
INNER JOIN test_dup AS T2
USING ( val );
--
Regards,
Richard Broersma Jr.
Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug