/*分为四步 *//*第1步：创建临时表空间  */create temporary tablespace user_temp  tempfile 'D:\oracle\oradata\Oracle9i\user_temp.dbf' size 50m  autoextend on  next 50m maxsize 20480m  extent management local;   /*第2步：创建数据表空间  */create tablespace user_data  logging  datafile 'D:\oracle\oradata\Oracle9i\user_data.dbf' size 50m  autoextend on  next 50m maxsize 20480m  extent management local;   /*第3步：创建用户并指定表空间  */create user username identified by password  default tablespace user_data  temporary tablespace user_temp;   /*第4步：给用户授予权限  */grant connect,resource,dba to username;