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Introduction
Exercises

Instruction

Keep going! You're halfway through!

Exercise

Count how many games were released each year (as the count column), what was the average cost of production (as the avg_cost column), and what was their average revenue (as the avg_revenue column).

Stuck? Here's a hint!

You'll need four columns:

  production_year,
  COUNT(...) AS count,
  AVG(...) AS avg_cost,
  AVG(...) AS avg_revenue

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

GROUP BY production_year