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  3. Data-Driven Decision Making in SQL

Exercise

Average rating per customer

Similar to what you just did, you will now look at the average movie ratings, this time for customers. So you will obtain a table with the average rating given by each customer. Further, you will include the number of ratings and the number of movie rentals per customer. You will report these summary statistics only for customers with more than 7 movie rentals and order them in ascending order by the average rating.

Instructions

100 XP
  • Group the data in the table renting by customer_id and report the customer_id, the average rating, the number of ratings and the number of movie rentals.
  • Select only customers with more than 7 movie rentals.
  • Order the resulting table by the average rating in ascending order.