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I have two tables: one, the resulting table from converting osm.xml via osm2po so I can use pgRouting, and another one that contains information on what edges each public vehicle passes through (|vehicle_code|edge_ids|). Note: one edge_id might contain many public vehicle codes.

So after executing pgRouting shortest path query, I want to know which vehicles are the best to use to navigate the shortest path to avoid too many transitions.

I'm kinda new to SQL; please help. Thanks!

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