My table is gone, confess: who did it?

You notice that a table has disappeared. You can use Logminer to find out who dropped it.

Missing archivelog? Do not rebuild your standby database

The synchronization of the physical standby in Oracle has halted, and you don’t have the required archivedlogs? It is still possible to synchronize without having to rebuild it; learn how.

Troubleshoot: data guard synchronization stuck with error ORA-01274

How to deal with ORA 01274 error in Oracle, after adding a datafile in primary site, causing standby to stop synchronizing