JOIN,ROUND,AVG,GROUP BY,ORDER BY

Author: mennaabdelelhady

Advanced Select and Joins/1731. The Number of Employees Which Report to Each Employee.sql

@@ -0,0 +1,6 @@
+SELECT e1.employee_id,e1.name,COUNT(e2.reports_to)AS reports_count,ROUND(AVG(e2.age)) AS average_age
+FROM employees e1
+JOIN employees e2
+ON e2.reports_to=e1.employee_id
+GROUP BY e1.employee_id,e1.name
+ORDER BY e1.employee_id;