DB_UNIQUE_NAME

Property	Description
Parameter type	String
Syntax	`DB_UNIQUE_NAME =` `database_unique_name`
Default value	Database instances: the value of `DB_NAME` Automatic Storage Management instances: `+ASM`
Modifiable	No
Basic	Yes
Oracle RAC	Multiple instances must have the same value.

DB_UNIQUE_NAME specifies a globally unique name for the database. Databases with the same DB_NAME within the same DB_DOMAIN (for example, copies of a database created for reporting or a physical standby) must have a unique DB_UNIQUE_NAME. Every database's DB_UNIQUE_NAME must be unique within the enterprise.

The value of DB_UNIQUE_NAME can be up to 30 characters and is case insensitive. The following characters are valid in a database name: alphanumeric characters, underscore (_), number sign (#), and dollar sign ($).