--date2016-7-3 

--select * from teachers

declare
v_user_id number(5);
v_sex     varchar2(20);


Cursor v_teacher_cusor is 
 select user_id,sex from teachers;
 
begin
 v_user_id := 0;


 open v_teacher_cusor;
 fetch v_teacher_cusor into v_user_id,v_sex;
 while v_teacher_cusor%found loop
   
   if v_sex = '男' then
     dbms_output.put_line('男 ' || v_user_id);    
     else
     dbms_output.put_line('女 ' || v_user_id);       
   end if;  
   fetch v_teacher_cusor into v_user_id,v_sex;
    
 end loop;
 close v_teacher_cusor;
 
end;