Need help with export, truncate and import partitions for schema

Question

I need to export a couple partions for our Oracle 10g Data Warehouse, truncate the partions and re-import the data using the exported file. How can I do this?
In summary here is what I need to do:
1) Export partition P_SUB_1 of table1
2) Export partition P_SUB2 of table2
3) Truncate P_SUB1 partition of table1
4) Truncate P_SUB2 partition of table2
5) Rebuild indexes on table1 and table2
6) Re-import data into each partition from export files.

Answer 1

If you have enough free space it might be easier to keep these partition in the database and do an exchange.
That means:
create table tmp_sub1 as select * from table1 where 1=0;
create table tmp_sub2 as select * from table2 where 1=0;
alter table table1 exchange partition sub1 with table tmp_sub1;
alter table table2 exchange partition sub2 with table tmp_sub2;After that your have the data of your original partitions in the tmp tables and the particular partitions in the partitioned table are empty and ready for the loading process.
If the loading process fail and you need to restore the partitions just reverse the exchange statements and you are done.