Are you really running "create table" and "drop table" statements 20,000+ times per day?!

I'm not aware of this "damaging the data dictionary". But then, I've never seen this happen in practice.

I know other databases support (encourage?) creating temp tables on-the-fly and removing them again. But in Oracle Database this is "doing it wrong". There's a lot of overhead in creating and dropping tables. Plus this is DDL, so commits, possibly breaking your transactions.

Instead, you should create permanent tables. And insert+delete from them as needed. If you need the data to be session specific, create them as "global temporary" tables.

If you have a specific performance issue you're struggling with, please post details of:

- Your SQL statement(s)
- The execution plan(s)
- Details about how slow it is, how fast you need it to be etc.

For instructions on how to get an execution plan, read:

https://blogs.oracle.com/sql/how-to-create-an-execution-plan