Challenge overview

What you will practice

Calculate the average salary for each department. Return columns: avg_salary, department_id. Order results by: department_id.

Public schema and sample data

id INTEGER	name TEXT	budget REAL	location TEXT
1	Engineering	1500000	New York
2	Marketing	800000	London
3	Sales	600000	Chicago

id INTEGER	first_name TEXT	last_name TEXT	email TEXT	department_id INTEGER	salary REAL	hire_date TEXT	manager_id INTEGER
1	Alice	Johnson	alice@corp.com	1	95000	2019-03-15	NULL
2	Bob	Smith	bob@corp.com	1	85000	2020-06-01	1
3	Carol	Williams