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Recursive Queries in PostgreSQL

Introduction
The very basics
Infinite looping
Processing graphs with recursive CTEs
30. Traveling salesman – exercise 2
Summary

Instruction

Well done! Let's do one more exercise based on this example.

Exercise

Bristol turned out to be a horrible location – it was too far away from London. Instead, the management decided to split the headquarters into three smaller offices: one in London, and the other two in two other cities.

Produce paths starting in London as before, but they should now consist of 3 cities only (London and the two other cities). Sort the paths in descending order based on total_distance so that management can decide where to place the offices.

Stuck? Here's a hint!

You only need to modify the outer query a bit!