I would tend to perform the analysis as above but with one major change. I would create a DateVar field which would show you the difference in days between the fields in the same way as demonstrated by Anbu Cheliyan. This would allow you to dynamically select what you wanted (such as more than 3 days).
This approach is of particular use if you are not sure what your important metrics are and their individual relevance.
So create the field:
Date#(Field2,'D-M-YYY') - Date#(Field1, 'D-M-YYY') as DateVar in your load statement.