Question:

>
> Hello,there
>    We have lots of history tables,I have partitioned the tables.
>    and export the old data.But it's not convenient for import always,
>    so ...I want to stored the old data on CD,not disk....
>    Does oracle support readonly datafiles (stored on CDs) ??

Answer:

Of course. Set yours tablespace into read-only mode: ALTER TABLESPACE
<name> READ ONLY;