Feb 24

brazil_customers.sql

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+SELECT * 
+FROM Customer 
+WHERE Country == "Brazil"

brazil_customers_invoices.sql

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+SELECT FirstName, LastName, InvoiceId, InvoiceDate, BillingCountry 
+FROM Customer JOIN Invoice ON Customer.CustomerId == Invoice.CustomerId
+WHERE Country == "Brazil"

country_invoices.sql

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+SELECT Invoice.BillingCountry,Count(*)
+FROM Invoice
+GROUP BY Invoice.BillingCountry

invoice_37_line_item_count.sql

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+SELECT Count(*)
+FROM InvoiceLine
+WHERE InvoiceId = 37

invoice_totals.sql

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+SELECT Employee.FirstName ||" "|| Employee.LastName AS "Employee Name" , Customer.FirstName ||" "|| Customer.LastName AS "Customer Name", Invoice.Total, Invoice.BillingCountry
+FROM Employee 
+JOIN Customer ON Customer.SupportRepId == Employee.EmployeeId 
+JOIN Invoice ON Invoice.CustomerId == Customer.CustomerId

line_item_track.sql

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+SELECT InvoiceLine.InvoiceId, Track.TrackId, Track.Name
+FROM InvoiceLine
+JOIN Track ON InvoiceLine.TrackId = Track.TrackId

line_item_track_artist.sql

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+SELECT InvoiceLine.InvoiceId, Track.TrackId, Track.Name, Artist.Name
+FROM InvoiceLine
+JOIN Track ON InvoiceLine.TrackId = Track.TrackId
+JOIN Album ON Track.AlbumId = Album.AlbumId
+JOIN Artist ON  Album.ArtistId = Artist.ArtistId

line_items_per_invoice.sql

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+SELECT Count(*) AS InvoiceIdNumber
+FROM InvoiceLine
+GROUP BY InvoiceId

non_usa_customers.sql

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+SELECT FirstName, LastName, CustomerId 
+FROM Customer 
+WHERE Country != "USA" 

playlists_track_count.sql

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+SELECT Playlist.PlaylistId, Playlist.Name, Count(*)
+FROM PlaylistTrack
+JOIN Playlist ON Playlist.PlaylistId = PlaylistTrack.PlaylistId
+GROUP BY Playlist.PlaylistId

sales_agent_customer_count.sql

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+SELECT Count(Customer.SupportRepId) AS NumberOfCustomers, Customer.SupportRepId, Employee.FirstName || " " || Employee.LastName AS FullName
+FROM Employee
+JOIN Customer ON Employee.EmployeeId == Customer.SupportRepId
+GROUP BY Employee.FirstName 

sales_agent_invoices.sql

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+SELECT Employee.FirstName, Employee.LastName, Invoice.*
+FROM Employee 
+JOIN Customer ON Customer.SupportRepId == Employee.EmployeeId 
+JOIN Invoice ON Invoice.CustomerId == Customer.CustomerId

sales_agent_total_sales.sql

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+SELECT Employee.FirstName ||" "|| Employee.LastName AS "Employee Name" ,  SUM(Total) AS TotalSales
+FROM Invoice
+JOIN Employee ON Employee.EmployeeId = Customer.SupportRepId
+JOIN Customer ON Customer.CustomerId = Invoice.CustomerId
+GROUP BY Employee.FirstName

sales_agents.sql

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+SELECT * 
+FROM Employee 
+WHERE Title == "Sales Support Agent" 

sales_per_country.sql

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+SELECT TotalSales, CountryName
+FROM (SELECT Count(Invoice.BillingCountry) AS TotalSales, Invoice.BillingCountry AS CountryName
+		FROM Employee
+		JOIN Customer ON Employee.EmployeeId == Customer.SupportRepId
+		JOIN Invoice ON Customer.CustomerId == Invoice.CustomerId
+		GROUP BY CountryName)

top_2009_agent.sql

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+SELECT MAX(Total), FullName 
+FROM (SELECT SUM(Invoice.Total) AS Total, Employee.FirstName || " " || Employee.LastName AS FullName,  Customer.FirstName || " " || Employee.EmployeeId 
+	  FROM Employee
+JOIN Customer ON Employee.EmployeeId == Customer.SupportRepId
+JOIN Invoice ON Customer.CustomerId == Invoice.CustomerId
+WHERE  strftime('%Y',InvoiceDate) IN ('2009')
+GROUP BY FullName)

top_2013_track.sql

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+SELECT *
+FROM (SELECT COUNT(Track.TrackId) AS TotalSales, Track.Name AS TrackName
+		FROM Invoice
+		JOIN InvoiceLine ON InvoiceLine.InvoiceId = Invoice.InvoiceId
+		JOIN Track ON InvoiceLine.TrackId = Track.TrackId
+		WHERE  strftime('%Y',InvoiceDate) IN ('2013')
+		GROUP BY TrackName
+		ORDER BY TotalSales 
+		LIMIT 1)

top_3_artists.sql

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+SELECT *
+FROM (SELECT COUNT(Album.ArtistId) AS TotalSales, Track.Name AS TrackName, Artist.Name AS ArtistName
+		FROM Album
+		JOIN Artist ON Artist.ArtistId = Album.ArtistId
+		JOIN Track ON Track.AlbumId = Album.AlbumId
+		JOIN Invoice ON Invoice.InvoiceId = InvoiceLine.InvoiceId
+		JOIN InvoiceLine ON Track.TrackId = InvoiceLine.TrackId
+		GROUP BY ArtistName)
+		ORDER BY TotalSales 
+		DESC LIMIT 3

top_5_tracks.sql

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+SELECT TrackName, TotalSales
+FROM (SELECT COUNT(Invoice.InvoiceId) AS TotalSales, Track.Name AS TrackName
+		FROM Invoice
+		JOIN InvoiceLine ON InvoiceLine.InvoiceId = Invoice.InvoiceId
+		JOIN Track ON InvoiceLine.TrackId = Track.TrackId
+		GROUP BY TrackName)
+		ORDER BY TotalSales 
+		DESC LIMIT 5

top_agent.sql

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+SELECT MAX(Total), FullName 
+FROM (SELECT SUM(Invoice.Total) AS Total, Employee.FirstName || " " || Employee.LastName AS FullName,  Customer.FirstName || " " || Employee.EmployeeId 
+	  FROM Employee
+JOIN Customer ON Employee.EmployeeId == Customer.SupportRepId
+JOIN Invoice ON Customer.CustomerId == Invoice.CustomerId
+GROUP BY FullName)

top_country.sql

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+SELECT MAX(TotalSales) , CountryName
+FROM (SELECT MAX(Invoice.Total) AS TotalSales, Invoice.BillingCountry AS CountryName
+		FROM Employee
+		JOIN Customer ON Employee.EmployeeId == Customer.SupportRepId
+		JOIN Invoice ON Customer.CustomerId == Invoice.CustomerId
+		GROUP BY CountryName)

top_media_type.sql

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+SELECT MediaName, TotalPlays
+FROM (SELECT COUNT(Track.TrackId) AS TotalPlays, Track.Name AS TrackName, Artist.Name AS ArtistName, MediaType.Name AS MediaName
+		FROM Album
+		JOIN Artist ON Artist.ArtistId = Album.ArtistId
+		JOIN Track ON Track.AlbumId = Album.AlbumId
+		JOIN Invoice ON Invoice.InvoiceId = InvoiceLine.InvoiceId
+		JOIN InvoiceLine ON Track.TrackId = InvoiceLine.TrackId
+		JOIN MediaType ON MediaType.MediaTypeId = Track.MediaTypeId
+		GROUP BY MediaName)
+		ORDER BY TotalPlays 
+		DESC LIMIT 1

total_invoices_{year}.sql

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+SELECT COUNT(*) 
+FROM Invoice 
+WHERE strftime('%Y',InvoiceDate) in ('2009', '2011')

total_sales_{year}.sql

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+SELECT Sum(Total)
+FROM Invoice
+WHERE strftime('%Y',InvoiceDate) in ('2009', '2011')

tracks_no_id.sql

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+SELECT Track.Name AS TrackName, MediaType.Name AS MediaName, Genre.Name AS GenreName
+FROM Track
+JOIN PlaylistTrack ON PlaylistTrack.TrackId = Track.TrackId
+JOIN Playlist ON Playlist.PlaylistId = PlaylistTrack.PlaylistId
+JOIN MediaType ON Track.MediaTypeId = MediaType.MediaTypeId
+JOIN Genre ON Genre.GenreId = Track.GenreId

unique_invoice_countries.sql

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+SELECT DISTINCT BillingCountry
+FROM Invoice