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Removing duplicate rows in PostgreSQL and Oracle

Oracle trick: [sql] DELETE FROM your_table WHERE rowid not in (SELECT MIN(rowid) FROM your_table GROUP BY column1, column2, column3); [/sql] Postgresql equivalent is ctid, so you can try something like [sql] delete from mytable where exists (select 1 from mytable t2 where t2.name = mytable.name and t2.address = mytable.address and t2.zip = mytable.zip and t2.ctid …

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