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The company manufacture 3 kinds of instruments, and each instrument has at least one unique attribute of its own. An instrument has to be either
The company manufacture 3 kinds of instruments, and each instrument has at least one unique attribute of its own. An instrument has to be either Piano, String Instrument or Percussion. Pianos have keyboard type, String Instrument have type of string, and Percussion have batter head. An instrument can be either a Piano, String, or Percussion, but not both at the same time. The company manufacture 3 kinds of instruments, and each instrument has at least one unique attribute of its own. An instrument has to be either Piano, String Instrument or Percussion. Pianos have keyboard type, String Instrument have type of string, and Percussion have batter head. An instrument can be either a Piano, String, or Percussion, but not both at the same time
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Databases A Beginners Guide
Authors: Andy Oppel
1st Edition
007160846X, 978-0071608466
