declare
   count_limit number := 10000;
   query_string varchar2(100) := 'select count(1) from ';
   total_count number;
   cursor c_query_user_tables is 
           select table_name 
           from user_tables 
           where table_name like 'T%' 
           order by table_name;
begin
   for atable in c_query_user_tables loop 
     execute immediate query_string || atable.table_name into total_count;
     if total_count >= count_limit then 
         dbms_output.put_line(atable.table_name || ' ' || total_count);
     end if;
   end loop;
end;