Re: How to remove duplicate lines but save one of the lines?

From: "A B" <gentosaker(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: How to remove duplicate lines but save one of the lines?
Date: 2008-07-21 15:51:07
Message-ID: dbbf25900807210851v23d6915fgdea194e7abc71746@mail.gmail.com
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> There is probably a more elegant way of doing it, but a simple way of doing
> it ( depending on the size of the table ) could be:
>
> begin;
>
> insert into foo select distinct * from orig_table;
> delete from orig_table;
> insert into orig_table select * from foo;
>
> commit;

Just to make it clear to me
Here foo is a table that I have to create with the command
CREATE TABLE foo (....same columns as orig_table);
?

Is it possible to add a unique constraint to the table, with a
"delete" option so it will delete duplicates?

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