Answering Business Questions using SQL

After starting a business of fictional digital music shop kind of like a mini-iTunes store, it's the moment to use our data to have some answers about the business. The database contains information about the artists, songs, and albums from the music shop, as well as information on the shop's employees, customers, and the customers purchases and it's SQLite datebase . For this project we're going to use SQL, this is the schema diagram of the database we're going to work on :