add project management I

Author: letsdeepchat

BASIC AGGREGATION FUNCTION/1075. Project Employees I.sql

@@ -0,0 +1,5 @@
+-- Write your PostgreSQL query statement below
+SELECT p.project_id, ROUND(AVG(e.experience_years), 2) AS average_years
+FROM Project p
+LEFT JOIN Employee e ON p.employee_id = e.employee_id
+GROUP BY p.project_id;