發送短信 : Translating relational schema with constraints into OODB schema

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