| From: | "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: remote duplicate rows |
| Date: | 2006-09-14 06:14:44 |
| Message-ID: | 20060914061444.GB1258@a-kretschmer.de |
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| Lists: | pgsql-general |
am Wed, dem 13.09.2006, um 15:46:58 -0700 mailte Junkone folgendes:
> hI
> i have a bad situation that i did not have primary key. so i have a
> table like this
> colname1 colname2
> 1 apple
> 1 apple
> 2 orange
> 2 orange
>
> It is a very large table. how do i remove the duplctes quickly annd
> without much change.
begin;
alter table foo rename to tmp;
create table foo as select distinct * from tmp;
commit;
You should create a primary key now to avoid duplicated entries...
HTH, Andreas
--
Andreas Kretschmer
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