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By: a guest on Jun 25th, 2012  |  syntax: None  |  size: 0.15 KB  |  hits: 24  |  expires: Never
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  1.  
  2. select num_dpt, nom_dpt
  3. from departaments d
  4. where not exists( select * from empleats e where e.num_dpt = d.num_dpt and e.ciutat_empl <> 'MADRID');