Difference between startup mount and startup mount exclusive
Fact: startup mount and startup mount exclusive are the same because default for startup mount is exclusive
STARTUP [FORCE][RESTRICT][NOMOUNT][MIGRATE][QUIET]
[PFILE=]
[MOUNT [EXCLUSIVE] x |
OPEN
]
For RAC and non-RAC databases, startup mount and startup mount exclusive have no differences.
startup mount exclusive is meant to shutdown all instances on a RAC and bringing up only one instance.
On a RAC database, when init parameter on all instances for cluster_database is set to TRUE, you will have to set cluster_database to FALSE and then shutdown all the RAC instances and then startup only one instance with startup mount exclusive. Since exclusive is default for startup mount, issuing startup mount is sufficient.
