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@web.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?