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

PostGIS

Introduction
6. Filtering groups

Instruction

Perfect! How about filtering entire groups of rows?

Exercise

For each city, show its name and the average amount of usd_spent there, calculated using data from all days spent in the city. Only show rows for which the average usd_spent is greater than 90.