title: Date difference duplicates query between last and penultimate dates
body: <p>I have a MS Access database that contains, among other things, a 'name' field and a 'date' field. The names contain duplicates because events to individuals with the 'name' sometimes occured more than once.</p>
  
  <p>What I want to do is identify duplicate 'names' where where the difference between the last 'date' less that of the penultimate date is  grater than 2 weeks. Otherwise, if the date difference is less than 2 week, the name will not be considered a duplciate.</p>
  
  <p>I hope this makes sense.</p>