Oracle Error code Rollup

Oracle Error Code Encyclopedia-the latest and most complete Oracle error code is helpful for finding Oracle database errors quickly

ORA-00001: Violation of UNIQUE constraint (.)

ORA-00017: Request session to set trace event

ORA-00018: Maximum number of sessions exceeded

ORA-00019: Maximum number of session licenses exceeded

ORA-00020: Maximum number of processes exceeded ()

ORA-00021: Session is attached to some other process; session cannot be converted

ORA-00022: Invalid session ID; Access denied

ORA-00023: Session reference process private memory; Cannot detach session

ORA-00024: Registration from multiple processes is not allowed in single process mode

ORA-00025: Unable to allocate

ORA-00026: Missing or invalid session ID

ORA-00027: Unable to delete current session

ORA-00028: Your conversation has been deleted

ORA-00029: Session is not a user session

ORA-00030: The user session ID does not exist.

ORA-00031: Mark the session to be deleted

ORA-00032: Invalid session transplant password

ORA-00033: The current session has a null transplant password

ORA-00034: cannot be in the current Pl/sql session

Ora-00035:license_max_users cannot be less than the current number of users