Re: How to delete completely duplicate rows

With C as (
Select row_number() over partition by (list, all, columns, here order by
oid) as rn
)
Delete
From C
Where rn > 1;
On Jan 1, 2014 7:15 AM, "Janek Sendrowski" <janek12(at)web(dot)de> wrote:

> Hi,
>
> I want to delete duplicates in my table. I've dropped the unique
> constraint to insert my data.
> My id value is a hash calculated witch the values of the two other columns.
> So I want to delete all columns, which are indentical, but keeping one.
>
> DELETE FROM table t1 USING table t2 WHERE t1.id = t2.id AND t1.ctid >
> t2.ctid
>
> But the oids aren't unique enough.
> What else could I do?
>
> Janek
>
>
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