From: | PFC <lists(at)boutiquenumerique(dot)com> |
---|---|
To: | lucas(at)presserv(dot)org, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Duplicated records |
Date: | 2005-05-24 21:26:04 |
Message-ID: | op.srattqosth1vuj@localhost |
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Thread: | |
Lists: | pgsql-sql |
> How can I delete the duplicated records with "DELETE FROM TABLE WHERE..."
> clause??
> The problem is becouse I have imported data from Dbase (dbf) file, and
> this
> function have not built the Constraint (unique, primary key, ...), and
> this
> function is usually executed.
If you have no primary key how can you reference a record in order to
delete it ?
I'd say use a temporary table...
If you have complete row dupes (ie. the entire row is duplicated) use
SELECT * FROM table GROUP BY *
(or select distinct)
If only the primary key is duplicated but other fields change, then you
have to decide which one you wanna keep !
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