create temporary tablespace user_temp  
tempfile ‘C:\dmp\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 TBS_RISK 
logging  
datafile ‘C:\dmp\TBS_RISK.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 RISK identified by RISK  
default tablespace user_data  
temporary tablespace user_temp;  
 
/*第4步：给用户授予权限  */
grant connect,resource,dba to RISK;

drop user RISK cascade;