If you deleted records in an oracle table that you did not intend to, oracle flashback may be of assistance.
You might need to alter the table to enable row movement.
I recently had an oracle user(schema) that was created with a profile of 'DEFAULT' which meant the user's password would expire. The user should have been created with a profile that does not expire its password. Well, the password expired and I have to change the password without actually changing it.
While trying to run Oracle Report services from from the command line i received the following error.
REP-0178: Reports Server cannot establish connection.