不用dbca，通过命令创建数据库示例

5dm

create database db1
maxinstances 1
maxloghistory 1
maxlogfiles 5
maxlogmembers 5
maxdatafiles 100
datafile '/oracle/app/oradata1/db1.dbf' size 100m
undo tablespace undotds datafile '/oracle/app/oradata1/undodb1.dbf' size 100m
autoextend on next 512k maxsize unlimited
default temporary tablespace tempts
character set us7ascii
national character set al16utf16
logfile group 1('/oracle/app/oradata1/redo01.log') size 100m
2('/oracle/app/oradata1/redo02.log') size 100m
3('/oracle/app/oradata1/redo03.log') size 100m;