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Question and Answer

Connor McDonald

Thanks for the question, DIPU.

Asked: August 04, 2016 - 3:36 pm UTC

Last updated: August 06, 2016 - 1:43 pm UTC

Version: 10 g

Viewed 1000+ times

You Asked

I have a table with 1 Million records. Because of undo log size, i can not delete this 1M records in one shot. So, need to create a PLSQL block which will delete the record in batches (let's say undo log can sustain .1 M records at one shot). Could you please tell me how i can efficiently write a PLSQL block to achieve this?

and Connor said...

Easiest way - get a larger undo tablespace - even if you simply create one temporarily.

But if you cannot...then you need a means of identifying the rows to delete, so that you can run the delete repeatedly.

For example, let's say the criteria was "status = 'OLD'". You could do:

begin
 loop
    delete T where status = 'OLD' and rownum < 100000;
    exit when sql%notfound;
    commit;
  end loop;
end;


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