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
ST_Equals
Relationships Between Geometries
ST_Distance and ST_Dwithin
Spatial joins practice
22. Spatial functions inside aggregates - exercise
Summary

Instruction

Perfect! One more exercise coming your way.

Exercise

For each district, show its name and the length of the longest railway track that intersects with it. Sort the results by length in descending order. Show the length in kilometers. Rename the second column to max.

Stuck? Here's a hint!

Use MAX(...) with ST_Length(...) as its argument. Don't forget to use ST_Transform.