CREATE BIGFILE TABLESPACE "DEMO" 
DATAFILE ‘+DATA‘ 
SIZE 256M 
AUTOEXTEND ON 
NEXT 256M 
MAXSIZE UNLIMITED 
LOGGING 
EXTENT MANAGEMENT LOCAL 
SEGMENT SPACE MANAGEMENT AUTO

CREATE USER "DEMO" PROFILE "DEFAULT" IDENTIFIED BY "*******" 
DEFAULT TABLESPACE "DEMO" 
TEMPORARY TABLESPACE "TEMP" 
ACCOUNT UNLOCK
GRANT "CONNECT" TO "DEMO"
GRANT "DBA" TO "DEMO"

oracle基本使用设定