IF条件

declare 

end;

LOOP循环

declare 
  cursor s is 
          select version from city_server t;
  s_ city_server.version%type;
begin
  open s;
  loop
      fetch s into s_;
        exit when s%notfound;
        DBMS_OUTPUT.put_line(s_);
  end loop;
  close s;
end;

PL/SQL个人学习笔记（二）