Hello and welcome to our first SQL challenge !
Your task is to write an SQL query that solves the given problem.
If you want, you can also take part in other April 2019 competitions. Below you can find some of them:
Have fun and good luck! :)
Did you like this challenge and would like to try your hand at some interesting big programming competitions? Check what’s all over the news in tech world in April 2019 in our article with upcoming IT Conferences, Hackathons and Online Challenges.