發送短信 : Multiple aggregations over data streams

  _____     ______    _____     _____             
 /  ___||  /_   _//  |__  //   |  ___||   ____    
| // __     -| ||-     / //    | ||__    |    \\  
| \\_\ ||   _| ||_    / //__   | ||__    | [] ||  
 \____//   /_____//  /_____||  |_____||  |  __//  
  `---`    `-----`   `-----`   `-----`   |_|`-`   
                                         `-`