Medium javascript

Average salary by department

Problem

Aggregation pipeline: group by department, avg salary.

Hints

Ready — edit the code above and click Run.

db.employees.aggregate([
  { $group: { _id: "$department", avgSalary: { $avg: "$salary" } } }
]);

Try solving on your own first, then reveal the official answer.

$group stage mirrors SQL GROUP BY—common MongoDB interview task.

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