From: | Andy Colson <andy(at)squeakycode(dot)net> |
---|---|
To: | "Gauthier, Dave" <dave(dot)gauthier(at)intel(dot)com> |
Cc: | "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Deleting one of 2 identical records |
Date: | 2011-09-06 17:52:08 |
Message-ID: | 4E665DC8.6010104@squeakycode.net |
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Lists: | pgsql-general |
On 9/6/2011 12:39 PM, Gauthier, Dave wrote:
> Hi:
>
> If I have a table that has 2 records which are identical with regard to
> all their column values, is there a way to delete one of them, leaving
> one remaining? Is there some unique record_id key of some sort I can use
> for somethign like this?
>
> Thanks in Advance!
>
Not easily that I know of. I have two thoughts:
1)
create table junk (like orig);
insert into junk select distinct from orig;
delete from orig where exists(select from junk);
insert into orig select * from junk;
2)
alter table orig add uid integer;
create sequence bob;
update orig set uid = nextval('bob');
drop sequence bob;
-- magic to delet using uid
Ah, Thom just answered. I like his better, but I'll post this just for
completeness...
-Andy
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