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.
Questo esercizio fa parte del corso
Data-Driven Decision Making in SQL
Istruzioni dell'esercizio
- Group the data in the table
rentingbycustomer_idand report thecustomer_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.
Esercizio pratico interattivo
Prova a risolvere questo esercizio completando il codice di esempio.
SELECT ___, -- Report the customer_id
___, -- Report the average rating per customer
___, -- Report the number of ratings per customer
___ -- Report the number of movie rentals per customer
FROM renting
GROUP BY customer_id
___ -- Select only customers with more than 7 movie rentals
ORDER BY ___; -- Order by the average rating in ascending order