oracle 添加表空间

/*分为四步 *//*第1步：创建临时表空间 */
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：创建数据表空间 */
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：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;
/*删除命名空间 */
DROP TABLESPACE xsnb INCLUDING CONTENTS  AND DATAFILES CASCADE CONSTRAINTS;