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Text File  |  1990-12-18  |  224b  |  9 lines
  1.  
  2. Listing 5
  3.  
  4. SELECT name FROM customer WHERE c# IN
  5.      (SELECT c# FROM invoice WHERE i# IN
  6.           (SELECT i# FROM litem WHERE p# IN
  7.                (SELECT p# from part
  8.                     WHERE pname = 'Pen')));
  9.