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By: a guest on May 5th, 2012  |  syntax: None  |  size: 0.34 KB  |  hits: 8  |  expires: Never
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  1. Cheap way of modeling friend relationships
  2. class User {
  3.     String username;
  4.     Text friends; // "joe,mary,frank,pete"
  5. }
  6.        
  7. class User {
  8.     String username;
  9.     List<String> friends;
  10.       // or //
  11.     Set<String> friends;
  12. }
  13.        
  14. SELECT COUNT FROM User WHERE
  15.     (username = "me" && friends = "bob") &&
  16.     (username = "bob" && friends = "me")
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