Deals Of The Week - hours only!Up to 80% off on all courses and bundles.-Close

Wrap course as a gift

Prepare your gift and double-check it looks just right.

Form validation errors

Recipient's Name:
Recipient's Email:
Your Message (Optional):
Proceed to Checkout

Window Functions

Introduction
Final quiz
4. Question 1
Summary

Instruction

Let's start the quiz. Question 1 out of 11.

Exercise

For each doctor, show first_name, last_name, age and the average age of all doctors.