Hi All,
I'm new in oracle and i want to know what is the difference between the ff:

Oracle Informix

The reason is I do not know how to create a new database in oracle. In informix, i only execute the "dbaccess", Query Language and execute "create database databasename".
the $INFORMIXSERVER=infsvr1.

In oracle, if i set $ORACLE_SID=orasvr1, and create a database, it cannot create database at all.

Where and how can i create a database into an oracle instance?????????????????

thanks in advance.