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Text File  |  1990-10-30  |  116 b   |  12 lines
  1.  
  2. Listing 2
  3.  
  4.  
  5. (SELECT * FROM a
  6.  MINUS
  7.  SELECT * FROM b)
  8. UNION
  9. (SELECT * FROM b
  10.  MINUS
  11.  SELECT * FROM a);
  12.