Tablespace Point-in-Time Recovery
Oracle provides another type of recovery operation known as tablespace point-in-time recovery (TSPITR). TSPITR is most commonly used with transportable tablespaces to recover from a variety of errors, such as mistakenly dropping a table or a tablespace, or encountering a logically corrupted table.
Transportable tablespaces are an efficient way to move tablespaces from one database to another. You can copy the actual tablespace files, rather than having to back up and restore them or use Import and Export to move the data.
To accomplish this type of recovery, you perform the following steps:
Take tablespaces that are to be recovered offline in the original database.
Set up an auxiliary database.
Recover the tablespace in the auxiliary database to the appropriate point in time.
Make the target tablespaces read-only in the auxiliary database.
Export the transportable tablespace information from the auxiliary database.
Drop the tablespace in the original database.
Copy the tablespace files from the auxiliary database to the original database.
Import the transportable tablespace information into the original database.
Use transportable tablespaces to move the recovered tablespace to the original database.
Enable read-write access for the new tablespaces.