Advanced Course

Monthly SQL Practice – January 2025

Check out this month's advanced challenge. Help Sven manage the services of his telecommunications company!

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Time to complete 2 h

Coding challenges 15

Skills you will gain

  • Solve complex SQL problems using advanced coding techniques
  • Apply window functions in real-life scenarios
  • Combine multiple tables effectively using JOIN operations
  • Tackle industry-specific SQL challenges for practical experience

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Description

Welcome to January 2025 SQL Practice! New tasks are waiting for you. If you have finished our Window Functions course or otherwise know how to use window functions, this is a good resource. Are you ready to solve the business problems in this SQL practice?

Young manager talking on the smartphone

In this SQL Practice, you will help Sven analyze his data. He is a manager at a telecommunications company in Norway. Sven has hired you, an SQL specialist, to perform a series of queries using his database. Help him gain important insights into how his services are doing. Which plan is the most popular? How much data do his customers use each month?

It is up to you to get the answers to these and other questions using your SQL skills!

Hint: In each exercise, you can see a sample of the data. Look in the right-hand menu, under the Database tab.

Have fun!

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    Practice writing SQL queries with our SQL coding practice! Every month, we release a new set of interactive exercises with real-time feedback.

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