//第一步：查看數據庫表空間位置   select t1.name,t2.name from v$tablespace t1,v$datafile t2 where t1.ts# = t2.ts#;    //第二步：創建臨時及默認表空間     create temporary tablespace spacename_temp    tempfile 'E:/APP/ADMINISTRATOR/ORADATA/ORCL/spacename.DBF'    size 50m    autoextend on    next 50m maxsize 20480m    extent management local;    create tablespace spacename    logging    datafile '第一步的路徑/tablespacename.DBF'    size 50m    autoextend on    next 50m maxsize 20480m    extent management local;    //第三步：創建用戶并指定表空間    create user username identified by password    default tablespace spacename    temporary tablespace spacename_temp;   //第四步：給用戶授予權限   grant dba,connect,resource to username;