oracle 添加表空間

/*分爲四步 *//*第1步：創建臨時表空間 */
create temporary tablespace user_temp 
tempfile 'C:\hy\oracle\product\10.2.0\tablespace\user_temp.dbf' 
size 50m 
autoextend on next 50m maxsize 20480m 
extent management local; 
/*第2步：創建數據表空間 */
create tablespace user_data 
logging datafile 'C:\hy\oracle\product\10.2.0\tablespace\user_data.dbf' 
size 50m autoextend on next 50m maxsize 20480m 
extent management local; 
/*第3步：創建用戶並指定表空間 */
create user username identified by password default tablespace user_data 
temporary tablespace user_temp; 
/*第4步：給用戶授予權限 */
grant connect,resource,dba to username;
/*刪除命名空間 */
DROP TABLESPACE xsnb INCLUDING CONTENTS  AND DATAFILES CASCADE CONSTRAINTS;