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Most Popular Genre per Country

advanced~12 min40 pts
📊 View Insights

Problem

The international marketing team needs to know the most popular music genre in each country by purchase count. This will help localize advertising campaigns.

Schema: Invoice

ColumnType
InvoiceIdINTEGER (Primary Key)
CustomerIdINTEGER (Foreign Key → Customer.CustomerId)
InvoiceDateTIMESTAMP
BillingAddressTEXT
BillingCityTEXT
BillingStateTEXT
BillingCountryTEXT
BillingPostalCodeTEXT
TotalNUMERIC(10,2)

Schema: Genre

ColumnType
GenreIdINTEGER (Primary Key)
NameTEXT

Requirements:

  • Join Invoice → InvoiceLine → Track → Genre
  • Count purchases per country per genre
  • Use ROW_NUMBER() partitioned by country, ordered by count descending
  • Filter to only the top genre per country (row number = 1)
  • Return Country, GenreName, PurchaseCount
  • Order by PurchaseCount descending, limit to 15
CTEWindow FunctionsROW_NUMBERJOINPARTITION BY
📊
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Related questions

  • Albums with Artist Namesintermediate
  • Tracks with Genre Namesintermediate
  • Customer Purchase Historyintermediate
  • Track Count by Genreintermediate
  • Average Song Duration by Genreintermediate
  • Most Prolific Artistsintermediate
  • Number Tracks Within Albumsintermediate
  • Rank Artists by Album Countintermediate
SQL Editor

Run your code to see the result here.

Topfolio

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  • Data Analyst vs Data Engineer vs Data Scientist

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company

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© 2026 Topfolio. All rights reserved.Made with ❤️ for aspiring analysts