gbekoilias/digital_music_data_analysis

Analysis of a digital music hold database to gain insights of various implications. db_PostgreSQL_pgadmin4

Music_Store_Data_Analysis 🗂️

SQL project to analyze 📊 online music 🎶 store data

This project is for beginners in SQL to analyze the music playlist 🔀 database. You can examine the dataset with SQL and help the store understand its business growth by answering simple questions❓.

Database and Tools

• pg_admin v7.4
• PostgreSQL

Data Sourcing and Structure

All data was obtained from here The Data base contain music labels and profiles of 11 tables namely, album, artist, customer, employee, genre, invoice, invoice_line, media_type, playlist, playlist_track and track Each table contain at least a primary key and at least a foreign key as shown in the ER diagram below

Queestion set 1-Easy

Who is the senior most employee based on job title?

Which countries have the most Invoice?

What are top 3 values of total invoice?

Which city has the best customers? We would like to throw a promotional Music Festival in the city we made the most money. Write a query that returns one city that has the highest sum of invoice totals. Return both the city name & sum of all invoice totals

Who is the best customer? The customer who has spent the most money will be declared the best customer. Write a query that returns the person who has spent the most money

Question set 2- Medium

Write query to return the email, first name, last name, & Genre of all Rock Music listeners. Return your list ordered alphabetically by email starting with A

Let's invite the artists who have written the most rock music in our dataset. Write a query that returns the Artist name and total track count of the top 10 rock bands

Return all the track names that have a song length longer than the average song length. Return the Name and Milliseconds for each track. Order by the song length with the longest songs listed first

Question set 3- Hard

Find how much amount spent by each customer on artists? Write a query to return customer name, artist name and total spent

We want to find out the most popular music Genre for each country. We determine the most popular genre as the genre with the highest amount of purchases. Write a query that returns each country along with the top Genre. For countries where the maximum number of purchases is shared return all Genres

Write a query that determines the customer that has spent the most on music for each country. Write a query that returns the country along with the top customer and how much they spent. For countries where the top amount spent is shared, provide all customers who spent this amount.