Delete volumes of Data in a table.

We have a table which has loads of data. When we execute the delete statement , it gives DB error as it was not able to delete huge volume of data.
Approach tried so far :
Keep a counter who size is say 10000. and execute delete statements every 10000 records. But still as the data is huge it still takes time.
Can anybody suggest some approaches ?

user12944938 wrote:
Oracle Version : 10g
SQL : DELETE FROM STUDENT WHERE YEAR = 2000.
The requirement is more of a yearly basis but on different tables[STUDENT, ADMIN, MANAGERS,........].
We have tried to run in off-hours.
STUDENT TABLE [ ID, FIRST NAME, MIDDLE NAME LAST NAME,.......................................................................................] AROUND 200 COLUMNS.Well you left out a lot of information from what i asked for so i don't have much to suggest.
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:2345591157689
Is a good read and may be of help to you.
Partitioning could also be an option (at which point you could drop the old partitions).
Really can't say knowing what we do (and more importantly, do not know) about your situation.

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Requirement ::
To use select Options for table name and based on the table names we want to delete the data from the tables...
conditions :
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Moderator message : Spec dumping is not allowed. Thread locked.
Edited by: Vinod Kumar on Sep 30, 2011 4:54 PM

Venkat,
I belive in LBWQ you can only see one entry for an application. You'll see only one entry MC*18 for all your datasources.
Do one thing. Do not delete from there. Run your "Job Control" job which moves all the data from LBWQ queue to RSA7 queue, making your LBWQ queue empty. Now go to RSA7 and delete your data for the specified datasource...
Been a while since I looked at those screens, but I believe I am right.
Good Luck
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988197 wrote:
Hi All,
There is a 13 years old data in DB, which holds data from 2001. The task assigned to me is to delete the old data from Main table and its associated tables.
87 tables are identified and data needs to be removed.
1) We don't have an option to bring down the DB, the DB should be online.
2) We can't disable triggers and constratins.
3) We can't disable LOGGING
4) The total Size of the tables that we are going to do the deleting is around 290 GB.
5) DB is Oracle 11g.
What I did is,
I wrote a Stored Procedure, that get's MONTH and YEAR as input parameter. This procedure is called 12 times to delete one year.
I have collected all the ID’s and stored in a separate table. Based on the id, I am deleting the data from each table and committing. (I was doing a bulk commit after deleting some group of tables, but those commits took lot of time.).
Now total time to delete 150 Million Rows from the entire table is 4 days to delete 7 years of data.
Is it any way I can make the process faster other than adding INDEX to avoid full table scans.
If you added another index, that would likely make the operation SLOWER because every time a row is deleted, the index would also have to be changed to reflect that fact. Indexes introduce more work to be done on DML operations.
RP0428 has it right. This is a one-time operation and you are already well down the road. Just keep going.
is there is a better approach to handle this?.
Advance Thanks for your response.
-Jac

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>
But the only thing is that such function cannot be used in SQL.
>
Perhaps you weren't including the use of autonomous transactions?
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874823 wrote:
delete from table1 partition (P_2008_1212)This approach is wrong - as Andre pointed, this is not how partition tables should be used.
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How to delete all data in all tables in one time ?!

1 CREATE OR REPLACE PROCEDURE delete_all_data
2 IS
3 v_statement VARCHAR2 (200);
4 BEGIN
5 FOR i IN (SELECT *
6 FROM user_tables)
7 LOOP
8 v_statement :=
9 'delete table ' || i.table_name ;
10 EXECUTE IMMEDIATE v_statement;
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12 commit;
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ORA-00903: invalid table name
ORA-06512: at "DE2.DELETE_ALL_DATA", line 10
ORA-06512: at line 1
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create or replace
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sUser Varchar2(128);
sConstraintName Varchar2(128);
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How to delete some date in target table at a mapping?
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Just to change a bit of terminology in the reply, within the mapping, click on operator properties and choose TRUNCATE/INSERT.
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