RE: Duplicate rows
- From: "Jacques Kilchoer" <Jacques.Kilchoer@xxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 3 Jun 2004 17:07:14 -0700
If you have more than two duplicate rows, the ">" in step 3) should be
an "=".
-----Original Message-----
Rachel Carmichael
...
3) delete the duplicates in the smaller table (runs a LOT faster than
trying to delete the duplicates from the source)
...
Sample code below:
...
JRK> with a ">" in the condition below you would end up listing
JRK> only one of the duplicate rows in the "dupes" table
3) delete from dupes a where rowid = (select min(rowid)
from dupes b
where a.unique_column1=b.unique_column1
and a.unique_column2=b.unique_column2
.... repeat above for all columns
)
/
...
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