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8.6

How to delete duplicate rows from a big table

Asked by stamese in Oracle Database

Tags: duplicate, oracle, delete, table, rows

Hello, happy to join the club.
I'm trying to delete 100000 duplicate rows from one Oracle table.
For each row it appears twice, identical to itself.

I tested a small SQL script as the following :
DELETE FROM TABLEDUMMY target WHERE ROWID > (
SELECT min(rowid) FROM TABLEDUMMY source
WHERE target.OJTCID = source.OJTCID);

I'ts working fine with a dummy table of 20 records.
But in real time, with my 200000 records, It never finish the task.
How can I do ? Thank you in advance.
Serge

View the Solution FREE for 30 Days

20091021-EE-VQP-81

How to delete duplicate rows from a big table

Asked by stamese in Oracle Database

Tags: duplicate, oracle, delete, table, rows

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