Creating a new table, to replace an old one

Question

Hi experts;
I'm looking for an advice about what I'm going to do.
This is the situation;
I got a production table with more than 1,000,000,000 of records.
the queries to this table are too slow, and I decided to create a new table, to replace this one.
But my doubts are:
How can I create a new table including the same structure as the old one, and with some data.
I got this query:
Create new_table as select * from old_table
where trans_year = '2012';
I know with this I got the structure, but what about indexes?
My other doubt is, to replace the old one, just I drop it, and rename the new one?
This table belong to an oracle 9i DB.
Thanks for your comments.
Al

Answer 1

>
How can I create a new table including the same structure as the old one, and with some data.
I got this query:
Create new_table as select * from old_table
where trans_year = '2012';
I know with this I got the structure, but what about indexes?
My other doubt is, to replace the old one, just I drop it, and rename the new one?
This table belong to an oracle 9i DB.
>
You could export the table metadata and then import it as a renamed table. That would keep the indexes, triggers, constraints.
But for one table it may be easier to just recreate the indexes and other objects.
For the query you may want to disable logging of the INSERT.
Create table new_table NOLOGGING as select * from old_table where trans_year = '2012';
-- set the table back to logging mode
ALTER table new_table LOGGING;Then you can drop the old table (if you already have a backup of it) and rename the new one to the old name.
The create will perform much better with NOLOGGING but because it is not logged you will not be able to recover the data from the log files.
So you should take a backup afterward.