finish Project Employee I

Author: babebp

SQL/SQL-50/Project_Employees_I.sql

@@ -0,0 +1,5 @@
+select p.project_id, round(avg(e.experience_years), 2) as average_years
+from Project p
+inner join Employee e
+on p.employee_id = e.employee_id
+group by p.project_id;