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SQL Practice Set in PostgreSQL

Introduction
Exercises

Instruction

Keep going! You're halfway through!

Exercise

Count how many games were released each year, what was the average cost of production and what was their average revenue.

Stuck? Here's a hint!

You'll need four columns:

  • production_year
  • COUNT(...)
  • AVG(...)
  • AVG(...)

And you'll need to group your results by the production_year column:

GROUP BY production_year