To initialize the database parameters, use is generally made of the default configuration which was stored when the database software was installed.
The configuration generated by the system will always be runnable. If necessary, you can still adjust the database parameters originally set to suit any specific requirements you may have.
Alternatively you can use the configuration of a
database instance already present on the computer or the configuration from a data backup. Even after this you can still adjust the database parameters to suit your own requirements.General Database Parameters
Special Database Parameters