Change DB_DOMAIN

[ligang]

I forgot add DB_DOMAIN in the initial file and database has been created already (version 8.0.5) Actually there is no necessary to include this parameter as the database is standalone with one instance .

But is it safe that I just add DB_DOMAIN in the database and restart .

[stecal]

If you don't need it, don't worry about it. You don't need it, and using it or not in this case has nothing to do with being "safe" or unsafe.

In a distributed database system, DB_DOMAIN specifies the logical location of the database within the network structure. You should set this parameter if this database is or ever will be part of a distributed system. The value consists of the extension components of a global database name, consisting of valid identifiers, separated by periods. Oracle Corporation recommends that you specify DB_DOMAIN as a unique string for all databases in a domain.

This parameter allows one department to create a database without worrying that it might have the same name as a database created by another department. If one sales department's DB_DOMAIN is JAPAN.ACME.COM, then their SALES database (SALES.JAPAN.ACME.COM) is uniquely distinguished from another database with DB_NAME = SALES but with DB_DOMAIN = US.ACME.COM.