Hello,
I have following events:
event 1:
product_category=dvd
product_name="the martian"
event=to_basket
event_time=2016-01-18T19:57:21+0100
...
event2:
product_category=dvd
product_name="the martian"
event=sold
event_time=2016-01-18T20:15:21+0100
...
How can I tell the time difference between 'to_basket' and 'sold' based on product_category and product_name?
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