Sales of Genres in Cities
Compito
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Which genre gives the biggest income in each city? To solve it:
- Calculate the total sales for each genre in each city: group records by city and genre.
- Order the records by city lexicographically and then by total sales, starting with most selling genre.
Output data under columns city
, genre
, and sales
.
Soluzione
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Sezione 2. Capitolo 6