ORA-01507

Error: ORA-01507: database not mounted

Causa: A command was attempted that requires the database to be mounted.

Acción: If you are using the ALTER DATABASE statement via the SVRMGR or SQL*PLUS STARTUP command, specify the MOUNT option to restart; else if you are directly doing an ALTER DATABASE DISMOUNT, do nothing; else specify the MOUNT option to ALTER DATABASE. If you are doing a backup or copy, you must first mount the desired database.