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From: "Tomasz Myrta" <jasiek@klaster.net>
To: wahab@mimos.my, pgsql-sql@postgresql.org
Subject: Re: How to delete duplicate record
Date: Mon, 10 Feb 2003 07:17:18 +0800
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> How do I delete a duplicated records?
> Here I've 7 duplicated records and tried to delete 6 from them.
> 
> I tried this query but has error
> b2b=> delete from biztypes where bizid = (select bizid from biztypes
> where bizid = 'B116' limit 6);
> ERROR:  More than one tuple returned by a subselect used as an
> expression.
> 
> I tried this query, but all records are deleted.
> b2b=> delete from biztypes where bizid = (select bizid from biztypes
> where bizid = 'B116' limit 1);
> DELETE 7
> 
> Any help are very much appreciated..
> Thanks. Wahab
Try this:
delete from biztypes where exists (select * from biztypes b2 where 
biztypes.bizid=b2.bizid)

Regards,
Tomasz Myrta