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6 respuestas
  1. 17 oct 2013, 18:03
    I have three group level, for example:

     

    Erika (level A)

     

         Ottobre (level B)

     

              Marta (2 records)  (level C)

     

              Lucia (3 records)

     

    I would count how many groups there are at level C, in this example the result should be 2. How can I do?
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