Dont use a PL/SQL cursor and loop, when bulk deletes are a possibility.
Delete from table where rownum < 1000;
commit;
Delete from table where rownum < 1000;
commit;
.....................................................
I would prefer this approach. 200000 is not much. With a create table as
you suggest, a lot of things to take care of. Viz. grants, rename, rebuild
indexes, space, backup after the creation, drop the old table, drop
indexes, et all.
Raj
Gurelei
<gurelei@yaho To: Multiple recipients of list ORACLE-L
<[EMAIL PROTECTED]>
o.com> cc:
Sent by: Subject: Delete performance
root@fatcity.
com
August 01,
2002 10:03 AM
Please
respond to
ORACLE-L
Hi all:
Someone at my shop wants to delete about 20% of roes
in a table (200000 rows out of a million). He wants to
set a commit frequency (like every 1000 records or
so)
to keep the rbs under control. I am not aware of any
easy way to do it other then writing a procedure, but
I may be missing something here. Is there any simple
way to accomplish this?
Also I have suggested instead of deleting 20% of the
rows, create a new table as a select and insert the
rest of the rows into it (then rebuild the indices and
rename). This can be done in nologging mode, without
redo logs and rbs segments. Is this a good idea to
try?
thanks for any info
Gene
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